Item lookup and communication are working properly when trying to sync DSM users with Active Directory. However, when a group is selected for syncing, the wizard shows “No new users will be added to the system”.
The issue occurs because the DSM filters out accounts that do not have a "userPrincipalName" attribute. This is the attribute representing the account name of the user in email form, such as email@example.com, compliant with RFC822.
To resolve the issue:
- Open Active Directory Users and Computers.
- Go to the Username > Properties > Accounts tab.
- Set a value for the User logon name field.
- Click Apply > Save.