After we deployed Live Communications Server in Active Directory, LCS service may not work after the password of the service account has expired. When this happens, users may find that they are unable to log in to Live Communications Service. Also when the administrator tries to restart the LCS service, the service does not start.
A similar problem can also occur for the Communicator Web Access service when the service account password has expired.
We can set the service accounts as “Password Never Expires” as a prevention method. This way, we can avoid the symptoms mentioned above.