JSI Tip 7772. When a Microsoft Windows Messenger 5.0 user attempts to sign in to Microsoft Office Live Communications Server 2003, they receive 'Signing into SIP Communications Service failed'?

The complete message is:

Signing into SIP Communications Service failed because the service is temporarily unavailable. Please try again later.

This problem will occur if the domain that the Live Communications Server is configured to host does not match the domain portion of the Session Initiation Protocol (SIP) Universal Resource Identifier (URI) that is assigned to the user.

If the Live Communications Server is configured to host the Corporate.JSIINC.COM domain but the SIP URI references JSIINC.COM, you will experience this behavior.



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