NextHop: Updated: Microsoft Federated Edge Server IP Address Change May 9th, 2014

After the server migration, the IP address for the microsoft.com SIP domain will change to 131.107.255.86. External companies who are federated with Microsoft may need to make changes to their infrastructure outlined under Instructions below in order for the federation to continue to function successfully.

If you have any feedback or issues, please contact Fedreq.

Instructions

Notify your contact with the external company that the IP address for the microsoft.com SIP (sipfed.microsoft.com) domain is changing to 131.107.255.86. Depending on how their infrastructure is configured, they may need to make one of the following changes:

Companies configured as direct federations using IP address (not sipfed.microsoft.com) will need to update their configuration to the new IP address.

Companies using their firewall(s) to filter by IP address will need to update their Access Control List (ACL) to the new IP address

Note: External companies that are configured as an Enhanced federation and have configured their firewall(s) to Allow All (inbound and outbound) on TCP:5061 according to Microsoft's recommendations will not need to make any changes. They will experience a brief interruption in their ability to contact Microsoft employees through Lync or Communicator while the A record in DNS is automatically updated to reflect the new IP address.

Recognizing many customers require change control, one suggestion to consider ensuring connectivity with Microsoft during this change is to keep the existing firewall rule and adding a new rule for the changed IP address. Approaching the transition in this manner will further reduce failed Instant Messaging and Presence updates during the actual transition as well protect the communications in the event of delayed implementation or a need to roll back the change.

Summary

Customers that originally configured their federation route with Microsoft to use an IP address will have to modify that entry and possibly firewall rules to ensure communications continue successfully.

Article Corrections

• March 9: Corrected the implementation date to be: March 18th
• March 10: Changed the IP address to be: 65.55.130.30
• April 21: Added a modification date field and the Article Corrections section
• May 2: Corrected the IP address to be: 65.55.30.130
• April 29th, 2014 - new IP address

We apologize for the inconvenience this has caused you.

Additional Information

To learn more, check out the following articles:

• Lync Server 2010 Federation Overview
• Enable or Disable Federation for your organization (Lync Server 2010)
• Configure Federation (OCS 2007 R2)

Lync Server Resources