We have setup a Cisco Identity Services Engine to manage WLAN access for our users. Access should be granted to users from a specific Windows Active Directory group. This works fine for users having a username consisting only of ASCII letters. However, user names having e.g. an umlaut fail. The live authentication log shows an error "22056 Subject not found in the applicable identity store(s)".
Any idea what could be wrong? (And, no, renaming all non-ASCII users is not an option)