Scott Oseychik

Microsoft | Exchange G&C Team (Public Folders, Modern Groups, Site Mailboxes, Shared Mailboxes, ... )

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  • Blog Post: Additional Windows Live Messenger PIC/Federation IP Addresses

    Notification In an effort to provide enhanced capacity and service reliance, Windows Live Messenger will soon be adding additional IP addresses used for PIC/Federation traffic. Some organizations have chosen to restrict this type of traffic to specific IP addresses, as referenced in Microsoft KB...
  • Blog Post: Announcing The Office Communications Server Remote Connectivity Analyzer

    Summary: Following on the heels of success of the Exchange Remote Connectivity Analyzer (created by Shawn McGrath and Brad Hughes), Premal Gandhi (UC Support Escalation Engineer), Matthew Fresoli (Supportability Program Manager) and Jason Stine (Senior Lead Program Manager) have been busy designing...
  • Blog Post: Additional troubleshooting step when encountering PIC issues w/AOL

    Summary: America Online ("AOL") uses Global Server Load Balancing ("GSLB") to maintain their SIP gateway farm. Their configuration uses sub VIPs, one for each of their two datacenters. Whenever AOL performs maintenance (new code, hardware, etc.), they use GSLB to take one datacenter offline while...
  • Blog Post: Tweaking OCS for PIC with Windows Live/MSN Messenger

    Summary: Windows Live/MSN Messenger defines both Minimum and Maximum values for Presence subscriptions. If the SUBSCRIBE method uses a value out of this range, it may result in a SIP failure. The minimum value is 3600 seconds and the MAX value is 13000 seconds. More Information: ...
  • Blog Post: RESOLVED - Technical inaccuracy in KB 897567 (specific to PIC, LCS/OCS, and Windows Live/MSN Messenger)

    Update: As of June 25, 2009, the KB article 897567 has been updated, and now is accurate. Summary: As of June 13, 2009, the content of the KB article 897567 contains an inaccuracy. The last octet for the second MSN IP address was improperly transposed. It’s published as 64.4.9. 254 , but that...
  • Blog Post: RESOLVED - OCS 2007 R2 PIC fails against AOL

    Issue: Microsoft Office Communicator 2007 R2 in conjunction with Office Communications Server 2007 R2 would intermittently fail to communicate with AOL AIM clients via PIC. Note that this would only reproduce if your OCS 2007 R2 Edge role is running Windows Server 2008 (x64); not Windows Server...
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