Improve Logging, Add UpdateUsers for MSSQL

Modules.Interfaces/ActiveDirectoryInterface/ISyncUsers.vb

@@ -3,6 +3,6 @@
     Function GetGroupId(GroupName As String) As Integer
     Function GetUserId(UserName As String) As Integer
     Function CreateUser(User As ADUser) As Integer
-    Sub AddUserToGroup(UserId As Integer, GroupId As Integer)
+    Function AddUserToGroup(UserId As Integer, GroupId As Integer) As Boolean
     Sub AddCustomAttributesToUser(User As ADUser, UserId As Integer)
 End Interface