Why Outstandings AD objects are created in Dell one.What is the cause for creating object.

we are using Dell one Idm and we have AD target.When i go to Manager tool->target synchronization;Active directory ,i can see many user and their AD groups .Why these user listed as Outstanding object.

These user are member of respectice AD groups in LIAM but in Actual AD target they are not part of that AD group.

Is there any reason listing these user under outstanding object list.Please help me...