Question : OCS 2007 R2 auto sign in works, manual doesn't

So our OCS has been working pretty much properly since it was set up.  There's only one thing that's been bugging me--when we first set up the server, either automatic or manual sign in worked.

Now, only automatic sign in works.  If you "log out" of communicator while it's running & try to log back in, you're prompted for your sign-in address, username, and password.  

When using the appropriate sign-in address (know it's the right one due to the OCS management console), username (taken from the user's ADSIEdit principle name, & tried in the format DOMAIN\username, DOMAIN.COM\user, as well as [email protected]) & password, we are still given an error that the password is incorrect.

Now, the only way short of logging out of windows & logging back in is to delete the HKCU\Software\Microsoft\Shared\UcClient keys for sign-in address & username.

Any ideas?

Answer : OCS 2007 R2 auto sign in works, manual doesn't

hrm, for some reason after checking all DC times, I found one was 4 hours off (in pacific, rather than eastern time zone)..after fixing this everything seems to be working ok.

Thanks anyway guys.