MSM710 AD authentication not processing all groups

[LeoKurz]

Hello,

I have a MSM710 joined a domain, configured groups in the MSM alike the groups in AD but authentication only works sometimes. Looking at the logs, the MSM doesn't process all groups the user is belonging to. I suppose it happens every time it hits a group with German umlauts (ä,ö,ü). In Germany ADs, the main builtin user group is called "Domänen-Benutzer" and the Domain Admins are "Domänen-Administratore", so there is a high chance to hit one of these!

Anyone similar experience and/or any idea?  Could of curse also be something else...

__Leo