[maximus1220]

so i had the same problem and i started comparing os versions and such after not too long of looking at my setup i decided to check the SYSTEM TIME of the DOMAIN CONTROLLER, remember in an AD-OD setup all system times must be within +- 5 minutes in sync otherwise the apple clients and server will not allow users to log in. (similar issue as when you use bootcamp and the go back to mac os x) for some reason the DC time was 5 min and 48 sec ahead of my OD server time and OS clients. the moment i made all servers the same time, it all started to work again. hope this helps… good luck!!!

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