Article ID: 972709 - Last Review: July 28, 2009 - Revision: 1.0

Error message when a SIP message request is sent from a federated partner in Communications Server 2007 R2: “500: Server Internal Error”

View products that this article applies to.

System TipThis article applies to a different operating system than the one you are using. Article content that may not be relevant to you is disabled.

Expand all | Collapse all

SYMPTOMS

When a federated partner sends a Session Initiation Protocol (SIP) message request, Microsoft Office Communications Server 2007 R2 returns the following generic SIP error message:

500: Server Internal Error

Back to the top

CAUSE

The SIP stack implementation of the federated partner does not copy the EPID parameter from the "To" header of the 200 OK message to the "To" header of the ACK message.

Back to the top

RESOLUTION

To resolve this issue, apply the following update:
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

969821 (http://support.microsoft.com/kb/969821/ ) Description of the update package for Office Communications Server 2007 R2: July, 2009

Back to the top