Non Exchange users Sync to GroupWise External Post Office

Users in Active Directory / Non Exchange users are synchronized to GroupWise External Post Office.
Active directory users should not sync to GroupWise.
Exchange users should sync to GroupWise.

It is unknown why some Active Directory users were syncing to GroupWise but removing Exchange attributes from the Active Directory users resolved the issue.

Steps to remove Exchange Attributes:

1. Go to Active Directory Users and Computers
2. Select users whom sync but should not
3. Right Click user and choose Exchange tasks
4. Remove Exchange attributes from the users.

Delete the non desired users from within the GroupWise External Post Office, they should not return to the External Post Office upon re-sync.