Article ID: 911783 - View products that this article applies to.
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After you enable a Session Initiation Protocol (SIP) account, the SIP account cannot log on to a Microsoft Office Live Communications Server 2005 server. Additionally, the SIP user may receive the following error message:
This behavior occurs even if the SIP account is enabled on the Live Communications Server 2005 server.
Signing in to SIP Communications Service failed because the password is incorrect or the sign-in name does not exist
To resolve this problem, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.