diff --git a/Jobs/EDMI/ADSync/ADSyncArgs.vb b/Jobs/EDMI/ADSync/ADSyncArgs.vb
index 1e64916b..86458756 100644
--- a/Jobs/EDMI/ADSync/ADSyncArgs.vb
+++ b/Jobs/EDMI/ADSync/ADSyncArgs.vb
@@ -2,4 +2,6 @@
     Inherits JobArgs
 
     Public RootPath As String
+    Public DisableFirebird As String
+    Public DisableMSSQL As String
 End Class
diff --git a/Jobs/EDMI/ADSync/ADSyncJob.vb b/Jobs/EDMI/ADSync/ADSyncJob.vb
index 6245604f..486b62a3 100644
--- a/Jobs/EDMI/ADSync/ADSyncJob.vb
+++ b/Jobs/EDMI/ADSync/ADSyncJob.vb
@@ -1,7 +1,7 @@
 Imports System.Collections.Generic
+Imports System.Data
 Imports DigitalData.Modules.Database
 Imports DigitalData.Modules.Interfaces
-Imports DigitalData.Modules.Jobs
 Imports DigitalData.Modules.Logging
 
 Public Class ADSyncJob
@@ -26,13 +26,21 @@ Public Class ADSyncJob
                 Exit Sub
             End If
 
-            Dim oGroups As List(Of ADGroup) = oSync.ListGroups()
+            'Dim oGroups As List(Of ADGroup) = oSync.ListGroups()
 
-            _Logger.Debug("Found {0} Groups", oGroups.Count)
+            ' 30.04.19: MSSQL als führendes System
+            Dim oGroups As New List(Of String)
+            Dim oDatatable = _MSSQL.GetDatatable("SELECT NAME FROM TBDD_GROUPS WHERE AD_SYNC = 1 AND ACTIVE = 1")
+
+            _Logger.Debug("Found {0} Groups", oDatatable.Rows.Count)
+
+            For Each oRow As DataRow In oDatatable.Rows
+                oGroups.Add(oRow.Item("NAME"))
+            Next
 
             For Each oGroup In oGroups
-                _Logger.Debug("Syncing Group {0}", oGroup.Name)
-                Dim oSyncedUsers = oSync.SyncUsersForGroup(oGroup.Name)
+                _Logger.Debug("Syncing Group {0}", oGroup)
+                Dim oSyncedUsers = oSync.SyncUsersForGroup(oGroup)
 
                 If oSyncedUsers Is Nothing Then
                     _Logger.Warn("Group {0} could not be synced!", oGroup)
diff --git a/Modules.Interfaces/ActiveDirectoryInterface.vb b/Modules.Interfaces/ActiveDirectoryInterface.vb
index bd12e115..12a24afa 100644
--- a/Modules.Interfaces/ActiveDirectoryInterface.vb
+++ b/Modules.Interfaces/ActiveDirectoryInterface.vb
@@ -254,7 +254,7 @@ Public Class ActiveDirectoryInterface
         Try
             Return Result.Properties.Item(PropertyName).Item(0)
         Catch ex As Exception
-            _logger.Warn("Property {0} not found", PropertyName)
+            _logger.Debug("Property {0} not found", PropertyName)
             Return String.Empty
         End Try
     End Function
diff --git a/Service.JobRunner/JobRunner.vb b/Service.JobRunner/JobRunner.vb
index aa378bb4..9bac2d36 100644
--- a/Service.JobRunner/JobRunner.vb
+++ b/Service.JobRunner/JobRunner.vb
@@ -105,6 +105,14 @@ Public Class JobRunner
                 oADJobArgs.RootPath = oArgs.Item("RootPath")
             End If
 
+            If oArgs.ContainsKey("DisableFirebird") AndAlso oArgs.Item("DisableFirebird") = "True" Then
+                oFirebird = Nothing
+            End If
+
+            If oArgs.ContainsKey("DisableMSSQL") AndAlso oArgs.Item("DisableMSSQL") = "True" Then
+                oMSSQL = Nothing
+            End If
+
             Dim oADSyncJob As New ADSyncJob(oLogConfig, oFirebird, oMSSQL)
             oADSyncJob.Start(oADJobArgs)