FINAL REMINDER: Additional Windows Live Messenger PIC/Federation IP Address

This is the one week reminder that the scheduled additional IP Address is on track for implementation on Friday, March 26, 2010.  For organizations restricting this traffic to specific IP addresses the updated list in the KB below MUST be in place by March 26, 2010 or PIC connectivity to MSN WILL fail.

897567    Known issues that occur with public instant messaging and Communications Server
https://support.microsoft.com/default.aspx?scid=kb;EN-US;897567

Barring an unforeseen issues, this is the final notification on this change.

Reference:

https://blogs.technet.com/tlyons/archive/2010/02/26/reminder-additional-windows-live-messenger-pic-federation-ip-address.aspx