SUMMARY:
In an effort to provide enhanced capacity and service reliance, Windows Live Messenger will soon be adding an additional IP address used for PIC/Federation traffic. Some organizations have chosen to restrict this type of traffic to specific IP addresses, as referenced in Microsoft KB 897567 (http://support.microsoft.com/kb/897567). With this in mind we want to give you advanced notice of our intended change if you have configured your enterprise network in this manner.
Please ensure your enterprise firewall configuration is updated with the full list of Windows Live Messenger addresses below on or before Friday, February 2, 2010. Windows Live Messenger will NOT enable the additional IP address until on or after February 2, 2010 (Pacific Time) to ensure your services will not be disrupted by this change.
IP address for Windows Live Messenger PIC/Federation:
64.4.9.181
64.4.9.245
64.4.50.110 (Additional new IP address)
65.54.52.53
65.54.52.245
65.54.227.249
For more information please reference Microsoft KB 897567, or for further assistance, please engage Microsoft Customer Support Services via http://support.microsoft.com.
USER ACTION:
Potential action for Office Communications Server and/or firewall administrator(s) if restrictions are in place allowing specific IPs to connect per KB 897567. Additionally, there will not be any further notification regarding this maintenance activity unless there is a broad disruption of service. In such cases, we will relay outage communication accordingly.
REFERENCES:
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