Communicator 2007 R2 fails to open new window when double-clicking a Contact

  Summary: When using Microsoft Office Communicator 2007 R2, double-clicking a Contact fails to launch a new conversation window.  However, you are still able to right-click a Contact, and start an IM session by selecting “Send an Instant Message.”   Cause: When double-clicking a Contact, OC 2007 R2 uses XML to initialize a new conversation…


Installation of OCS 2007 R2 Hotfix Package 969834 may fail if SQL settings have been changed

  Summary:   Installation of the OCS 2007 R2 “Backend” hotfix package ( may fail, and unfortunately, the error message presented to the Administrator isn’t entirely clear as to what the root cause is.     More Information:   If you find that installation of OCS2009-DBUpgrade.msi is failing against your backend SQL RTC databases, locate…


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 and writing a complimentary tool: The Office Communications Server Remote Connectivity…


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 they update it and point all of the SIP…


Federation and/or PIC may fail against partners using 2048-bit signed Root CAs

  Summary:   You may find that OCS 2007 / OCS 2007 R2’s Federation and/or PIC fails against partners who do not support Entrust root certificates signed using a 2048-bit public key.   For example, the “broken” certificate chain may resemble the following:   Edge server’s certificate -> Entrust L1B chain -> Entrust 2048 Root…


OCS 2007 R2 Federation may fail against Lotus Sametime

  Summary: Using Microsoft Office Communications Server 2007 R2, Federation may fail against organizations that are using Lotus Sametime.   Resolution: IBM has a hotfix which addresses this issue within Lotus Sametime.   More Information: Please refer the following IBM support document; Ref #1389588  


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:   MinPresenceSubscriptionExpiry   ·         Stored…


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, but that should be .245.  We are…


Failure to establish PIC connectivity to MSN

  Symptoms:   LCS 2005, OCS 2007, and/or OCS 2007 R2 fail to establish PIC connectivity to MSN after changes were made to the MSN infrastructure on May 9, 2009     Data:   In the logs, you’ll see the following data:   TL_ERROR(TF_CONNECTION) [1]08B4.146C::05/12/2009-15:32:27.115.00004bcf (SIPStack,SIPAdminLog::TraceConnectionRecord:1224.idx(157))$$begin_record LogType: connection Severity: error Text: Receive operation on the…


RESOLVED – Federation with Microsoft is down (aka: "It’s not you, it’s me.")

  We’re actively debugging this, and I’ll update this post once we have this resolved. UPDATE (6pm, Eastern): We have identified the issue, and will be making changes this evening to rectify the issue.  Things should be resolved by tomorrow morning. UPDATE 2 (9pm, Eastern): Huge thanks to the RTC Ops, RTC SE, and Core…