In our Environment user keep getting an error message:

"You have been signed been signed out of Communications Service, either because your user name or password, or because your sign-in information could not be verified with the authentication server. Please sign in again using your new credentials. If the problem persists, contact your system administrator.

When this message is displayed Windows Messenger will allow you to sign back into the service but users will have problems contacting you. You will receive message that your message can't be delivered.

Has anyone dealt with this issue?

Thanks
LCS4theWin