"Employees without user accounts" question

Hello.  Is there a way to get more information on the "Employees without user accounts"  list on the overview please?  If I highlight, it just says "Employees that are assigned this definition but cannot own a corresponding user account in the target system" but no obvious way to see what's rejected, and where Slight smile

These are only test users, some synched OI from LDAP and failing to create AD accounts (in OI) and some created as employees just to test the OI->AD part of the process.  I suspect it's something to do with missing a Central Account, but I don't know where to look for evidence.

Thanks for any help,