diff --git a/lib/taskana-core/src/main/java/pro/taskana/CustomField.java b/lib/taskana-core/src/main/java/pro/taskana/CustomField.java
index 153a2bd15..82e7f9481 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/CustomField.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/CustomField.java
@@ -13,5 +13,11 @@ public enum CustomField {
     CUSTOM_7,
     CUSTOM_8,
     CUSTOM_9,
-    CUSTOM_10
+    CUSTOM_10,
+    CUSTOM_11,
+    CUSTOM_12,
+    CUSTOM_13,
+    CUSTOM_14,
+    CUSTOM_15,
+    CUSTOM_16
 }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/TaskMonitorService.java b/lib/taskana-core/src/main/java/pro/taskana/TaskMonitorService.java
index 10a0e7ed1..5c2424ede 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/TaskMonitorService.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/TaskMonitorService.java
@@ -18,6 +18,10 @@ import pro.taskana.impl.report.impl.WorkbasketLevelReport;
  */
 public interface TaskMonitorService {
 
+    String DIMENSION_CLASSIFICATION_CATEGORY = "CLASSIFICATION_CATEGORY";
+    String DIMENSION_CLASSIFICATION_KEY = "CLASSIFICATION_KEY";
+    String DIMENSION_WORKBASKET_KEY = "WORKBASKET_KEY";
+
     /**
      * Returns a {@link WorkbasketLevelReport} grouped by workbaskets. The report contains the total numbers of tasks of
      * the respective workbasket as well as the total number of all tasks. If no filter is required, the respective
@@ -128,46 +132,6 @@ public interface TaskMonitorService {
         List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays)
         throws InvalidArgumentException;
 
-    /**
-     * Returns a list of all task ids in the selected items of a {@link pro.taskana.impl.report.Report}. By default the
-     * age of the tasks is counted in working days. The tasks of the report are filtered by workbaskets, states,
-     * categories, domains and values of a custom field. If no filter is required, the respective parameter should be
-     * null. Tasks with Timestamp DUE = null are not considered.
-     *
-     * @param workbasketIds
-     *            a list of workbasket ids objects to filter by workbaskets. To omit this filter, use null for this
-     *            parameter
-     * @param states
-     *            a list of states objects to filter by states. To omit this filter, use null for this parameter
-     * @param categories
-     *            a list of categories to filter by categories. To omit this filter, use null for this parameter
-     * @param domains
-     *            a list of domains to filter by domains. To omit this filter, use null for this parameter
-     * @param customField
-     *            a custom field to filter by the values of the custom field. To omit this filter, use null for this
-     *            parameter
-     * @param customFieldValues
-     *            a list of custom field values to filter by the values of the custom field. To omit this filter, use
-     *            null for this parameter
-     * @param columnHeaders
-     *            a list of columnHeaders that specify the subdivision into different cluster of due dates. Days in past
-     *            are represented as negative values and days in the future are represented as positive values. To avoid
-     *            tasks are counted multiple times or not be listed in the report, these columnHeaders should not
-     *            overlap and should not have gaps. If the ReportLineDefinition should represent a single day,
-     *            lowerLimit and upperLimit have to be equal. The outer cluster of a report should have open ends. These
-     *            open ends are represented with Integer.MIN_VALUE and Integer.MAX_VALUE.
-     * @param inWorkingDays
-     *            a boolean parameter that specifies whether the age of the tasks should be counted in days or in
-     *            working days
-     * @return the report
-     * @throws InvalidArgumentException
-     *             thrown if DaysToWorkingDaysConverter is initialized with null
-     */
-    List<String> getTaskIdsOfWorkbasketLevelReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays, List<SelectedItem> selectedItems)
-        throws InvalidArgumentException;
-
     /**
      * Returns a {@link CategoryReport} grouped by categories. The report contains the total numbers of tasks of the
      * respective category as well as the total number of all tasks. The tasks of the report are filtered by
@@ -623,45 +587,10 @@ public interface TaskMonitorService {
      *            a list of categories to filter by categories. To omit this filter, use null for this parameter
      * @param domains
      *            a list of domains to filter by domains. To omit this filter, use null for this parameter
-     * @param customField
-     *            a custom field to filter by the values of the custom field. To omit this filter, use null for this
-     *            parameter
-     * @param customFieldValues
-     *            a list of custom field values to filter by the values of the custom field. To omit this filter, use
-     *            null for this parameter
-     * @param columnHeaders
-     *            a list of columnHeaders that specify the subdivision into different cluster of due dates. Days in past
-     *            are represented as negative values and days in the future are represented as positive values. To avoid
-     *            tasks are counted multiple times or not be listed in the report, these columnHeaders should not
-     *            overlap and should not have gaps. If the ReportLineDefinition should represent a single day,
-     *            lowerLimit and upperLimit have to be equal. The outer cluster of a report should have open ends. These
-     *            open ends are represented with Integer.MIN_VALUE and Integer.MAX_VALUE.
-     * @param selectedItems
-     *            a list of {@link SelectedItem}s that are selected from the report whose task ids should be determined.
-     * @return the list of task ids
-     * @throws InvalidArgumentException
-     *             thrown if columnHeaders is null or if selectedItems is empty or null
-     */
-    List<String> getTaskIdsOfCategoryReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, List<SelectedItem> selectedItems)
-        throws InvalidArgumentException;
-
-    /**
-     * Returns a list of all task ids in the selected items of a {@link pro.taskana.impl.report.Report}. By default the
-     * age of the tasks is counted in working days. The tasks of the report are filtered by workbaskets, states,
-     * categories, domains and values of a custom field. If no filter is required, the respective parameter should be
-     * null. Tasks with Timestamp DUE = null are not considered.
-     *
-     * @param workbasketIds
-     *            a list of workbasket ids objects to filter by workbaskets. To omit this filter, use null for this
-     *            parameter
-     * @param states
-     *            a list of states objects to filter by states. To omit this filter, use null for this parameter
-     * @param categories
-     *            a list of categories to filter by categories. To omit this filter, use null for this parameter
-     * @param domains
-     *            a list of domains to filter by domains. To omit this filter, use null for this parameter
+     * @param classificationKeys
+     *            a list of task classification key to filter. To omit this filter, use null for this parameter
+     * @param excludedClassificationKeys
+     *            a list of task classification key to exclude. To omit this filter, use null for this parameter
      * @param customField
      *            a custom field to filter by the values of the custom field. To omit this filter, use null for this
      *            parameter
@@ -680,14 +609,18 @@ public interface TaskMonitorService {
      *            working days
      * @param selectedItems
      *            a list of {@link SelectedItem}s that are selected from the report whose task ids should be determined.
+     * @param dimension
+     *            defines the meaning of the key in the {@link SelectedItem}s.
      * @return the list of task ids
      * @throws InvalidArgumentException
      *             thrown if columnHeaders is null or if selectedItems is empty or null
      */
-    List<String> getTaskIdsOfCategoryReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays,
-        List<SelectedItem> selectedItems) throws InvalidArgumentException;
+    List<String> getTaskIdsForSelectedItems(List<String> workbasketIds, List<TaskState> states, List<String> categories,
+        List<String> domains, List<String> classificationKeys,
+        List<String> excludedClassificationKeys, CustomField customField, List<String> customFieldValues,
+        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays, List<SelectedItem> selectedItems,
+        String dimension)
+        throws InvalidArgumentException;
 
     /**
      * Returns a list of distinct custom attribute values for the selection from the entire task pool.
diff --git a/lib/taskana-core/src/main/java/pro/taskana/impl/SelectedItem.java b/lib/taskana-core/src/main/java/pro/taskana/impl/SelectedItem.java
index 92a84d97f..0fcd96ead 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/impl/SelectedItem.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/impl/SelectedItem.java
@@ -7,6 +7,7 @@ package pro.taskana.impl;
 public class SelectedItem {
 
     private String key;
+    private String subKey;
     private int upperAgeLimit;
     private int lowerAgeLimit;
 
@@ -18,6 +19,14 @@ public class SelectedItem {
         this.key = key;
     }
 
+    public String getSubKey() {
+        return subKey;
+    }
+
+    public void setSubKey(String subKey) {
+        this.subKey = subKey;
+    }
+
     public int getUpperAgeLimit() {
         return upperAgeLimit;
     }
@@ -36,7 +45,8 @@ public class SelectedItem {
 
     @Override
     public String toString() {
-        return "Key: " + this.key + ", Limits: (" + this.lowerAgeLimit + "," + this.getUpperAgeLimit() + ")";
+        return "Key: " + this.key + ", SubKey: " + this.subKey + ", Limits: (" + this.lowerAgeLimit + ","
+            + this.getUpperAgeLimit() + ")";
     }
 
 }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/impl/TaskMonitorServiceImpl.java b/lib/taskana-core/src/main/java/pro/taskana/impl/TaskMonitorServiceImpl.java
index c2ea8a973..a3185674d 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/impl/TaskMonitorServiceImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/impl/TaskMonitorServiceImpl.java
@@ -288,60 +288,6 @@ public class TaskMonitorServiceImpl implements TaskMonitorService {
         }
     }
 
-    @Override
-    public List<String> getTaskIdsOfCategoryReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, List<SelectedItem> selectedItems)
-        throws InvalidArgumentException {
-        return getTaskIdsOfCategoryReportLineItems(workbasketIds, states, categories, domains, customField,
-            customFieldValues, columnHeaders, true, selectedItems);
-    }
-
-    @Override
-    public List<String> getTaskIdsOfCategoryReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays,
-        List<SelectedItem> selectedItems) throws InvalidArgumentException {
-        if (LOGGER.isDebugEnabled()) {
-            LOGGER.debug("entry to getTaskIdsOfCategoryReportLineItems(workbasketIds = {}, states = {}, "
-                + "categories = {}, domains = {}, customField = {}, customFieldValues = {}, "
-                + "columnHeaders = {}, inWorkingDays = {}, selectedItems = {})",
-                LoggerUtils.listToString(workbasketIds), LoggerUtils.listToString(states),
-                LoggerUtils.listToString(categories), LoggerUtils.listToString(domains), customField,
-                LoggerUtils.listToString(customFieldValues), LoggerUtils.listToString(columnHeaders),
-                inWorkingDays, LoggerUtils.listToString(selectedItems));
-        }
-        try {
-            taskanaEngineImpl.openConnection();
-
-            if (columnHeaders == null) {
-                throw new InvalidArgumentException("ReportLineItemDefinitions can´t be used as NULL-Parameter");
-            }
-            if (selectedItems == null || selectedItems.size() == 0) {
-                throw new InvalidArgumentException(
-                    "SelectedItems can´t be used as NULL-Parameter and should not be empty");
-            }
-
-            configureDaysToWorkingDaysConverter();
-
-            if (inWorkingDays) {
-                selectedItems = convertWorkingDaysToDays(selectedItems, columnHeaders);
-            }
-
-            // List<String> taskIds = taskMonitorMapper.getTaskIdsOfCategoriesBySelectedItems(workbasketIds, states,
-            // categories, domains, customField, customFieldValues, selectedItems);
-
-            List<String> taskIds = taskMonitorMapper.getTaskIdsForSelectedItems(workbasketIds, states,
-                categories, domains, customField, customFieldValues, "CLASSIFICATION_CATEGORY", selectedItems);
-
-            return taskIds;
-
-        } finally {
-            taskanaEngineImpl.returnConnection();
-            LOGGER.debug("exit from getTaskIdsOfCategoryReportLineItems().");
-        }
-    }
-
     @Override
     public List<String> getCustomAttributeValuesForReport(List<String> workbasketIds, List<TaskState> states,
         List<String> categories, List<String> domains, List<String> classificationIds,
@@ -376,27 +322,34 @@ public class TaskMonitorServiceImpl implements TaskMonitorService {
     }
 
     @Override
-    public List<String> getTaskIdsOfWorkbasketLevelReportLineItems(List<String> workbasketIds, List<TaskState> states,
-        List<String> categories, List<String> domains, CustomField customField, List<String> customFieldValues,
-        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays, List<SelectedItem> selectedItems)
-        throws InvalidArgumentException {
+    public List<String> getTaskIdsForSelectedItems(List<String> workbasketIds, List<TaskState> states,
+        List<String> categories, List<String> domains, List<String> classificationIds,
+        List<String> excludedClassificationIds, CustomField customField, List<String> customFieldValues,
+        List<TimeIntervalColumnHeader> columnHeaders, boolean inWorkingDays,
+        List<SelectedItem> selectedItems, String dimension) throws InvalidArgumentException {
         if (LOGGER.isDebugEnabled()) {
-            LOGGER.debug("entry to getTaskIdsOfWorkbasketLevelReportLineItems(workbasketIds = {}, states = {}, "
+            LOGGER.debug("entry to getTaskIdsForSelectedItems(workbasketIds = {}, states = {}, "
                 + "categories = {}, domains = {}, customField = {}, customFieldValues = {}, "
-                + "columnHeaders = {}, inWorkingDays = {}, selectedItems = {})",
+                + "columnHeaders = {}, inWorkingDays = {}, selectedItems = {}, dimension = {})",
                 LoggerUtils.listToString(workbasketIds), LoggerUtils.listToString(states),
-                LoggerUtils.listToString(categories), LoggerUtils.listToString(domains), customField,
+                LoggerUtils.listToString(categories), LoggerUtils.listToString(domains),
+                LoggerUtils.listToString(classificationIds), LoggerUtils.listToString(excludedClassificationIds),
+                customField,
                 LoggerUtils.listToString(customFieldValues), LoggerUtils.listToString(columnHeaders),
-                inWorkingDays, LoggerUtils.listToString(selectedItems));
+                inWorkingDays, LoggerUtils.listToString(selectedItems), dimension);
         }
         try {
             taskanaEngineImpl.openConnection();
             if (columnHeaders == null) {
-                throw new InvalidArgumentException("ReportLineItemDefinitions can´t be used as NULL-Parameter");
+                throw new InvalidArgumentException("ColumnHeader must not be null.");
             }
             if (selectedItems == null || selectedItems.size() == 0) {
                 throw new InvalidArgumentException(
-                    "SelectedItems can´t be used as NULL-Parameter and should not be empty");
+                    "SelectedItems must not be null or empty.");
+            }
+            boolean joinWithAttachments = subKeyIsSet(selectedItems);
+            if (joinWithAttachments && !TaskMonitorService.DIMENSION_CLASSIFICATION_KEY.equals(dimension)) {
+                throw new InvalidArgumentException("SubKeys are supported for dimension CLASSIFICATION_KEY only.");
             }
 
             configureDaysToWorkingDaysConverter();
@@ -405,18 +358,15 @@ public class TaskMonitorServiceImpl implements TaskMonitorService {
                 selectedItems = convertWorkingDaysToDays(selectedItems, columnHeaders);
             }
 
-            // List<String> taskIds = taskMonitorMapper.getTaskIdsOfWorkbasketLevelBySelectedItems(workbasketIds,
-            // states,
-            // categories, domains, customField, customFieldValues, selectedItems);
-
             List<String> taskIds = taskMonitorMapper.getTaskIdsForSelectedItems(workbasketIds, states,
-                categories, domains, customField, customFieldValues, "WORKBASKET_KEY", selectedItems);
+                categories, domains, classificationIds, excludedClassificationIds, customField, customFieldValues,
+                dimension, selectedItems, joinWithAttachments);
 
             return taskIds;
 
         } finally {
             taskanaEngineImpl.returnConnection();
-            LOGGER.debug("exit from getTaskIdsOfWorkbasketLevelReportLineItems().");
+            LOGGER.debug("exit from getTaskIdsForSelectedItems().");
         }
     }
 
@@ -464,4 +414,13 @@ public class TaskMonitorServiceImpl implements TaskMonitorService {
             this.taskanaEngineImpl.getConfiguration().isGermanPublicHolidaysEnabled());
     }
 
+    private boolean subKeyIsSet(List<SelectedItem> selectedItems) {
+        for (SelectedItem selectedItem : selectedItems) {
+            if (selectedItem.getSubKey() != null && !selectedItem.getSubKey().isEmpty()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
 }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/mappings/TaskMonitorMapper.java b/lib/taskana-core/src/main/java/pro/taskana/mappings/TaskMonitorMapper.java
index 3679138d6..b9253f6d9 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/mappings/TaskMonitorMapper.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/mappings/TaskMonitorMapper.java
@@ -208,26 +208,38 @@ public interface TaskMonitorMapper {
         @Param("customFieldValues") List<String> customFieldValues);
 
     @Select("<script>"
-        + "SELECT ID FROM TASKANA.TASK "
+        + "SELECT TASK.ID FROM TASKANA.TASK "
+        + "<if test=\"joinWithAttachments\">"
+        + "LEFT JOIN TASKANA.ATTACHMENT ON TASK.ID = ATTACHMENT.TASK_ID "
+        + "</if>"
         + "<where>"
         + "<if test=\"workbasketIds != null\">"
-        + "WORKBASKET_ID IN (<foreach collection='workbasketIds' item='workbasketId' separator=','>#{workbasketId}</foreach>) "
+        + "TASK.WORKBASKET_ID IN (<foreach collection='workbasketIds' item='workbasketId' separator=','>#{workbasketId}</foreach>) "
         + "</if>"
         + "<if test=\"states != null\">"
-        + "AND STATE IN (<foreach collection='states' item='state' separator=','>#{state}</foreach>) "
+        + "AND TASK.STATE IN (<foreach collection='states' item='state' separator=','>#{state}</foreach>) "
         + "</if>"
         + "<if test=\"categories != null\">"
-        + "AND CLASSIFICATION_CATEGORY IN (<foreach collection='categories' item='category' separator=','>#{category}</foreach>) "
+        + "AND TASK.CLASSIFICATION_CATEGORY IN (<foreach collection='categories' item='category' separator=','>#{category}</foreach>) "
         + "</if>"
         + "<if test=\"domains != null\">"
         + "AND DOMAIN IN (<foreach collection='domains' item='domain' separator=','>#{domain}</foreach>) "
         + "</if>"
-        + "<if test=\"customField != null and customFieldValues != null\">"
-        + "AND ${customField}  IN (<foreach collection='customFieldValues' item='customFieldValue' separator=','>#{customFieldValue}</foreach>) "
+        + "<if test='classificationIds != null'>"
+        + "AND TASK.CLASSIFICATION_ID IN (<foreach collection='classificationIds' item='classificationId' separator=','>#{classificationId}</foreach>) "
         + "</if>"
-        + "AND DUE IS NOT NULL AND ( "
+        + "<if test='excludedClassificationIds != null'>"
+        + "AND TASK.CLASSIFICATION_ID NOT IN (<foreach collection='excludedClassificationIds' item='excludedClassificationId' separator=','>#{excludedClassificationId}</foreach>) "
+        + "</if>"
+        + "<if test=\"customField != null and customFieldValues != null\">"
+        + "AND TASK.${customField}  IN (<foreach collection='customFieldValues' item='customFieldValue' separator=','>#{customFieldValue}</foreach>) "
+        + "</if>"
+        + "AND TASK.DUE IS NOT NULL AND ( "
         + "<foreach collection='selectedItems' item='selectedItem' separator=' OR '>"
-        + "#{selectedItem.key} = ${groupedBy} AND "
+        + "#{selectedItem.key} = TASK.${groupedBy} AND "
+        + "<if test=\"joinWithAttachments\">"
+        + "ATTACHMENT.CLASSIFICATION_KEY = #{selectedItem.subKey} AND "
+        + "</if>"
         + "<if test=\"_databaseId == 'db2'\">"
         + "#{selectedItem.upperAgeLimit} >= (DAYS(DUE) - DAYS(CURRENT_TIMESTAMP)) AND "
         + "#{selectedItem.lowerAgeLimit} &lt;= (DAYS(DUE) - DAYS(CURRENT_TIMESTAMP)) "
@@ -243,8 +255,11 @@ public interface TaskMonitorMapper {
     List<String> getTaskIdsForSelectedItems(@Param("workbasketIds") List<String> workbasketIds,
         @Param("states") List<TaskState> states,
         @Param("categories") List<String> categories, @Param("domains") List<String> domains,
+        @Param("classificationIds") List<String> classificationIds,
+        @Param("excludedClassificationIds") List<String> excludedClassificationIds,
         @Param("customField") CustomField customField, @Param("customFieldValues") List<String> customFieldValues,
-        @Param("groupedBy") String groupedBy, @Param("selectedItems") List<SelectedItem> selectedItems);
+        @Param("groupedBy") String groupedBy, @Param("selectedItems") List<SelectedItem> selectedItems,
+        @Param("joinWithAttachments") boolean joinWithAttachments);
 
     @Select("<script>"
         + "SELECT DOMAIN, STATE, COUNT(STATE) as COUNT "
diff --git a/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfCategoryReportAccTest.java b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfCategoryReportAccTest.java
index 2088a8bdd..171ee85dc 100644
--- a/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfCategoryReportAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfCategoryReportAccTest.java
@@ -82,8 +82,9 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s3.setUpperAgeLimit(0);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(null, null, null, null, null, null,
-            columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(11, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
@@ -126,8 +127,9 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s3.setUpperAgeLimit(0);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(workbasketIds, null, null, null, null,
-            null, columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(workbasketIds, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(4, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
@@ -163,8 +165,9 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s3.setUpperAgeLimit(0);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(null, states, null, null, null, null,
-            columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, states, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(11, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
@@ -201,8 +204,9 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s2.setUpperAgeLimit(0);
         selectedItems.add(s2);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(null, null, categories, null, null,
-            null, columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, categories, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(3, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
@@ -237,8 +241,9 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s3.setUpperAgeLimit(0);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(null, null, null, domains, null, null,
-            columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, domains, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(4, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000020"));
@@ -275,8 +280,10 @@ public class GetTaskIdsOfCategoryReportAccTest {
         s3.setUpperAgeLimit(0);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfCategoryReportLineItems(null, null, null, null, customField,
-            customFieldValues, columnHeaders, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null, null,
+            customField,
+            customFieldValues,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         assertEquals(5, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000020"));
@@ -286,6 +293,26 @@ public class GetTaskIdsOfCategoryReportAccTest {
         assertTrue(ids.contains("TKI:000000000000000000000000000000000032"));
     }
 
+    @Test(expected = InvalidArgumentException.class)
+    public void testThrowsExceptionIfSubKeysAreUsed() throws InvalidArgumentException {
+        TaskMonitorService taskMonitorService = taskanaEngine.getTaskMonitorService();
+
+        List<TimeIntervalColumnHeader> columnHeaders = getListOfColumnHeaders();
+
+        List<SelectedItem> selectedItems = new ArrayList<>();
+
+        SelectedItem s1 = new SelectedItem();
+        s1.setKey("EXTERN");
+        s1.setSubKey("INVALID");
+        s1.setLowerAgeLimit(-5);
+        s1.setUpperAgeLimit(-2);
+        selectedItems.add(s1);
+
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
+    }
+
     private List<TimeIntervalColumnHeader> getListOfColumnHeaders() {
         List<TimeIntervalColumnHeader> columnHeaders = new ArrayList<>();
         columnHeaders.add(new TimeIntervalColumnHeader(Integer.MIN_VALUE, -11));
diff --git a/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfClassificationReportAccTest.java b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfClassificationReportAccTest.java
new file mode 100644
index 000000000..7f0ac06f9
--- /dev/null
+++ b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfClassificationReportAccTest.java
@@ -0,0 +1,185 @@
+package acceptance.monitoring;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.sql.DataSource;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import pro.taskana.TaskMonitorService;
+import pro.taskana.TaskanaEngine;
+import pro.taskana.TaskanaEngine.ConnectionManagementMode;
+import pro.taskana.configuration.TaskanaEngineConfiguration;
+import pro.taskana.database.TestDataGenerator;
+import pro.taskana.exceptions.InvalidArgumentException;
+import pro.taskana.impl.SelectedItem;
+import pro.taskana.impl.TaskanaEngineImpl;
+import pro.taskana.impl.configuration.DBCleaner;
+import pro.taskana.impl.configuration.TaskanaEngineConfigurationTest;
+import pro.taskana.impl.report.impl.TimeIntervalColumnHeader;
+
+/**
+ * Acceptance test for all "get task ids of classification report" scenarios.
+ */
+public class GetTaskIdsOfClassificationReportAccTest {
+
+    protected static TaskanaEngineConfiguration taskanaEngineConfiguration;
+    protected static TaskanaEngine taskanaEngine;
+
+    @BeforeClass
+    public static void setupTest() throws Exception {
+        resetDb();
+    }
+
+    public static void resetDb() throws SQLException, IOException {
+        DataSource dataSource = TaskanaEngineConfigurationTest.getDataSource();
+        DBCleaner cleaner = new DBCleaner();
+        cleaner.clearDb(dataSource, true);
+        dataSource = TaskanaEngineConfigurationTest.getDataSource();
+        taskanaEngineConfiguration = new TaskanaEngineConfiguration(dataSource, false);
+        taskanaEngineConfiguration.setGermanPublicHolidaysEnabled(false);
+        taskanaEngine = taskanaEngineConfiguration.buildTaskanaEngine();
+        ((TaskanaEngineImpl) taskanaEngine).setConnectionManagementMode(ConnectionManagementMode.AUTOCOMMIT);
+        cleaner.clearDb(dataSource, false);
+        TestDataGenerator testDataGenerator = new TestDataGenerator();
+        testDataGenerator.generateMonitoringTestData(dataSource);
+    }
+
+    @Test
+    public void testGetTaskIdsOfClassificationReport() throws InvalidArgumentException {
+        TaskMonitorService taskMonitorService = taskanaEngine.getTaskMonitorService();
+
+        List<TimeIntervalColumnHeader> columnHeaders = getListOfColumnHeaders();
+
+        List<SelectedItem> selectedItems = new ArrayList<>();
+
+        SelectedItem s1 = new SelectedItem();
+        s1.setKey("L10000");
+        s1.setLowerAgeLimit(0);
+        s1.setUpperAgeLimit(0);
+        selectedItems.add(s1);
+
+        SelectedItem s2 = new SelectedItem();
+        s2.setKey("L10000");
+        s2.setLowerAgeLimit(Integer.MIN_VALUE);
+        s2.setUpperAgeLimit(-11);
+        selectedItems.add(s2);
+
+        SelectedItem s3 = new SelectedItem();
+        s3.setKey("L30000");
+        s3.setLowerAgeLimit(Integer.MIN_VALUE);
+        s3.setUpperAgeLimit(-11);
+        selectedItems.add(s3);
+
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_KEY);
+
+        assertEquals(6, ids.size());
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000001"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000004"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000007"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000010"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000033"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
+    }
+
+    @Test
+    public void testGetTaskIdsOfClassificationReportWithAttachments() throws InvalidArgumentException {
+        TaskMonitorService taskMonitorService = taskanaEngine.getTaskMonitorService();
+
+        List<TimeIntervalColumnHeader> columnHeaders = getListOfColumnHeaders();
+
+        List<SelectedItem> selectedItems = new ArrayList<>();
+
+        SelectedItem s1 = new SelectedItem();
+        s1.setKey("L10000");
+        s1.setSubKey("L11000");
+        s1.setLowerAgeLimit(0);
+        s1.setUpperAgeLimit(0);
+        selectedItems.add(s1);
+
+        SelectedItem s2 = new SelectedItem();
+        s2.setKey("L10000");
+        s2.setSubKey("L11000");
+        s2.setLowerAgeLimit(Integer.MIN_VALUE);
+        s2.setUpperAgeLimit(-11);
+        selectedItems.add(s2);
+
+        SelectedItem s3 = new SelectedItem();
+        s3.setKey("L30000");
+        s3.setLowerAgeLimit(Integer.MIN_VALUE);
+        s3.setUpperAgeLimit(-11);
+        selectedItems.add(s3);
+
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_KEY);
+
+        assertEquals(2, ids.size());
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000001"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000033"));
+    }
+
+    @Test
+    public void testGetTaskIdsOfClassificationReportWithDomainFilter() throws InvalidArgumentException {
+        TaskMonitorService taskMonitorService = taskanaEngine.getTaskMonitorService();
+
+        List<TimeIntervalColumnHeader> columnHeaders = getListOfColumnHeaders();
+
+        List<SelectedItem> selectedItems = new ArrayList<>();
+
+        SelectedItem s1 = new SelectedItem();
+        s1.setKey("L10000");
+        s1.setLowerAgeLimit(0);
+        s1.setUpperAgeLimit(0);
+        selectedItems.add(s1);
+
+        SelectedItem s2 = new SelectedItem();
+        s2.setKey("L10000");
+        s2.setLowerAgeLimit(Integer.MIN_VALUE);
+        s2.setUpperAgeLimit(-11);
+        selectedItems.add(s2);
+
+        SelectedItem s3 = new SelectedItem();
+        s3.setKey("L30000");
+        s3.setLowerAgeLimit(Integer.MIN_VALUE);
+        s3.setUpperAgeLimit(-11);
+        selectedItems.add(s3);
+
+        List<String> domains = new ArrayList<>();
+        domains.add("DOMAIN_B");
+        domains.add("DOMAIN_C");
+
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, domains, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_CLASSIFICATION_KEY);
+
+        assertEquals(3, ids.size());
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000001"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000004"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
+    }
+
+    private List<TimeIntervalColumnHeader> getListOfColumnHeaders() {
+        List<TimeIntervalColumnHeader> columnHeaders = new ArrayList<>();
+        columnHeaders.add(new TimeIntervalColumnHeader(Integer.MIN_VALUE, -11));
+        columnHeaders.add(new TimeIntervalColumnHeader(-10, -6));
+        columnHeaders.add(new TimeIntervalColumnHeader(-5, -2));
+        columnHeaders.add(new TimeIntervalColumnHeader(-1));
+        columnHeaders.add(new TimeIntervalColumnHeader(0));
+        columnHeaders.add(new TimeIntervalColumnHeader(1));
+        columnHeaders.add(new TimeIntervalColumnHeader(2, 5));
+        columnHeaders.add(new TimeIntervalColumnHeader(6, 10));
+        columnHeaders.add(new TimeIntervalColumnHeader(11, Integer.MAX_VALUE));
+        return columnHeaders;
+    }
+
+}
diff --git a/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfWorkbasketReportAccTest.java b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfWorkbasketReportAccTest.java
index 17eb46767..42c39bf0f 100644
--- a/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfWorkbasketReportAccTest.java
+++ b/lib/taskana-core/src/test/java/acceptance/monitoring/GetTaskIdsOfWorkbasketReportAccTest.java
@@ -6,6 +6,7 @@ import static org.junit.Assert.assertTrue;
 import java.io.IOException;
 import java.sql.SQLException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import javax.sql.DataSource;
@@ -78,9 +79,9 @@ public class GetTaskIdsOfWorkbasketReportAccTest {
         s3.setUpperAgeLimit(Integer.MAX_VALUE);
         selectedItems.add(s3);
 
-        List<String> ids = taskMonitorService.getTaskIdsOfWorkbasketLevelReportLineItems(null, null, null, null, null,
-            null,
-            columnHeaders, true, selectedItems);
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            null, null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_WORKBASKET_KEY);
 
         assertEquals(7, ids.size());
         assertTrue(ids.contains("TKI:000000000000000000000000000000000001"));
@@ -92,6 +93,43 @@ public class GetTaskIdsOfWorkbasketReportAccTest {
         assertTrue(ids.contains("TKI:000000000000000000000000000000000050"));
     }
 
+    @Test
+    public void testGetTaskIdsOfWorkbasketReportWithExcludedClassifications() throws InvalidArgumentException {
+        TaskMonitorService taskMonitorService = taskanaEngine.getTaskMonitorService();
+
+        List<TimeIntervalColumnHeader> columnHeaders = getListOfColumnHeaders();
+
+        List<SelectedItem> selectedItems = new ArrayList<>();
+
+        SelectedItem s1 = new SelectedItem();
+        s1.setKey("USER_1_1");
+        s1.setLowerAgeLimit(0);
+        s1.setUpperAgeLimit(0);
+        selectedItems.add(s1);
+
+        SelectedItem s2 = new SelectedItem();
+        s2.setKey("USER_1_1");
+        s2.setLowerAgeLimit(Integer.MIN_VALUE);
+        s2.setUpperAgeLimit(-11);
+        selectedItems.add(s2);
+
+        SelectedItem s3 = new SelectedItem();
+        s3.setKey("USER_1_2");
+        s3.setLowerAgeLimit(1000);
+        s3.setUpperAgeLimit(Integer.MAX_VALUE);
+        selectedItems.add(s3);
+
+        List<String> ids = taskMonitorService.getTaskIdsForSelectedItems(null, null, null, null, null,
+            Collections.singletonList("CLI:000000000000000000000000000000000001"), null, null,
+            columnHeaders, true, selectedItems, TaskMonitorService.DIMENSION_WORKBASKET_KEY);
+
+        assertEquals(4, ids.size());
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000006"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000009"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000031"));
+        assertTrue(ids.contains("TKI:000000000000000000000000000000000050"));
+    }
+
     private List<TimeIntervalColumnHeader> getListOfColumnHeaders() {
         List<TimeIntervalColumnHeader> columnHeaders = new ArrayList<>();
         columnHeaders.add(new TimeIntervalColumnHeader(Integer.MIN_VALUE, -11));
diff --git a/lib/taskana-core/src/test/java/pro/taskana/impl/TaskMonitorServiceImplTest.java b/lib/taskana-core/src/test/java/pro/taskana/impl/TaskMonitorServiceImplTest.java
index 33b7e586e..d1db7c2b4 100644
--- a/lib/taskana-core/src/test/java/pro/taskana/impl/TaskMonitorServiceImplTest.java
+++ b/lib/taskana-core/src/test/java/pro/taskana/impl/TaskMonitorServiceImplTest.java
@@ -28,6 +28,7 @@ import org.mockito.MockitoAnnotations;
 import org.mockito.junit.MockitoJUnitRunner;
 
 import pro.taskana.CustomField;
+import pro.taskana.TaskMonitorService;
 import pro.taskana.TaskState;
 import pro.taskana.configuration.TaskanaEngineConfiguration;
 import pro.taskana.exceptions.InvalidArgumentException;
@@ -443,11 +444,13 @@ public class TaskMonitorServiceImplTest {
     }
 
     @Test
-    public void testGetTaskIdsOfCategoryReportLineItems() throws InvalidArgumentException {
+    public void testGetTaskIdsForSelectedItems() throws InvalidArgumentException {
         List<String> workbasketIds = Collections.singletonList("WBI:000000000000000000000000000000000001");
         List<TaskState> states = Arrays.asList(TaskState.CLAIMED, TaskState.READY);
         List<String> categories = Collections.singletonList("EXTERN");
         List<String> domains = Collections.singletonList("DOMAIN_A");
+        List<String> classificationIds = Collections.singletonList("L10000");
+        List<String> excludedClassificationIds = Collections.singletonList("L20000");
         CustomField customField = CustomField.CUSTOM_1;
         List<String> customFieldValues = Collections.singletonList("Geschaeftsstelle A");
         List<TimeIntervalColumnHeader> reportLineItemDefinitions = Collections.singletonList(
@@ -460,18 +463,22 @@ public class TaskMonitorServiceImplTest {
         List<SelectedItem> selectedItems = Collections.singletonList(selectedItem);
 
         List<String> expectedResult = Collections.singletonList("TKI:000000000000000000000000000000000001");
-        doReturn(expectedResult).when(taskMonitorMapperMock).getTaskIdsForSelectedItems(workbasketIds,
-            states, categories, domains, customField, customFieldValues, "CLASSIFICATION_CATEGORY", selectedItems);
+        when(taskMonitorMapperMock.getTaskIdsForSelectedItems(workbasketIds,
+            states, categories, domains, classificationIds, excludedClassificationIds, customField, customFieldValues,
+            "CLASSIFICATION_CATEGORY", selectedItems, false)).thenReturn(expectedResult);
 
-        List<String> actualResult = cut.getTaskIdsOfCategoryReportLineItems(workbasketIds, states, categories, domains,
-            customField, customFieldValues, reportLineItemDefinitions, selectedItems);
+        List<String> actualResult = cut.getTaskIdsForSelectedItems(workbasketIds, states, categories, domains,
+            classificationIds, excludedClassificationIds,
+            customField, customFieldValues, reportLineItemDefinitions, true, selectedItems,
+            TaskMonitorService.DIMENSION_CLASSIFICATION_CATEGORY);
 
         verify(taskanaEngineImplMock, times(1)).openConnection();
         verify(taskanaEngineImplMock, times(2)).getConfiguration();
         verify(taskanaEngineConfiguration, times(1)).isGermanPublicHolidaysEnabled();
         verify(taskanaEngineConfiguration, times(1)).getCustomHolidays();
         verify(taskMonitorMapperMock, times(1))
-            .getTaskIdsForSelectedItems(any(), any(), any(), any(), any(), any(), any(), any());
+            .getTaskIdsForSelectedItems(any(), any(), any(), any(), any(), any(), any(), any(), any(), any(),
+                eq(false));
         verify(taskanaEngineImplMock, times(1)).returnConnection();
         verifyNoMoreInteractions(taskanaEngineImplMock, taskMonitorMapperMock, taskanaEngineConfiguration);