Mino – The UC Guy

Microsoft Unified Communications Blog

Users migrated from OCS 2007 RTM version to R2 version will get an error that all contact’s presence is “Unknown”

Posted by Mino on April 10, 2009

Cause:
—–
Local cache of MOC client problem. MOC failed to update current status of
contact.

Solution:
—–
Delete local cache.
Location is
(Vista/2008)
“%userprofile%\AppData\Local\Microsoft\Communicator”
(XP/2003)
“%userprofile%\local settings\application data\Microsoft\Communicator”.

Simple and Quick 🙂

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One Response to “Users migrated from OCS 2007 RTM version to R2 version will get an error that all contact’s presence is “Unknown””

  1. What else would you suggest to also clear the cache in Outlook? This fix worked, and then users are still seeing presence unknown for outlook.

    Thanks!

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