A few days ago I got a call from the Helpdesk technicians reporting OCS issues. It turns out that 3 way IM conference sessions stopped working. My first thought was to check the status of the OCS services, but they all appeared to be running. The error displayed in the logs was 3098 which after research turned out to be related to certificate issue. After I looked at my certificate store I found out that the Certificate was expired.
After reissuing the certificate I continued to get errors (3097) relating to a downed or disabled MCU. I continued to read many, many forums until I found one which seemed to have the my same issue. The forum poster had called Microsoft and after a long troubleshooting session they found out that the IM Conferencing Service was being run by the RTCComponentServer rather than the RTCService. Everything started working after I made the change.
I am still wondering why this stopped working, given that this configuration was set up since the initial setup of OCS 2007 r2.
LCSCMD commands to activate and Deactivate the IM Conferencing on OCS 2007 r2
Activate:
LCSCmd.exe /MCU /Action:deactivate /Role:IMMCU
Deactivate:
LCSCmd.exe /MCU /Action:Activate /Role:IMMCU /Pool01 /Password:OptimusPrime
No need to issue /username if you are logged on with an account that can perform this action.
I these are some post that I rread in my effort to fix the issue.
http://blogs.technet.com/b/daveh/archive/2009/03/30/error-joining-im-livemeeting-conferences-in-office-communications-server-2007.aspx
http://techiefixation.blogspot.com/2009/01/office-communicator-2007-3-party.html
http://cmcgreanor.wordpress.com/2009/09/02/ocs-2007-r2-mcu-factory-issue/
http://ocsguy.com/2010/01/13/a-certificate-gotcha-that-got-me-again/
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