Hello,
Had a perfectly working LCS 2005 w/ 50 users. I rebooted the server yesterday to fix an unrelated tape drive problem and first LCS services had logon failure, then once I reset the service account PWs and got all services running, no one can log in anymore. We use smart cards for workstation logon, and even I can't log in with a username and paswword. What could have messed up? Tried Messenger 5.1 & communicator 2005 client.

below is the error when trying to lon in.

Error Messeage
"Signing in to SIP Communication Service failed because the sign-in name,username,or password is incorrect,or the authentication service is not compatible with this version of the program. If you have signed in correctly and the problem persists, contact your network administrator."