Article ID: 945543 - View products that this article applies to.
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After you search for contacts in Microsoft Office Communicator 2007, the cached person objects are not released until you log off from Communicator 2007. This problem causes high physical memory usage.
This problem occurs if person object references are not released by Communicator 2007 in a timely manner.
To resolve this problem, download and install the hotfix that is described in the following article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/943083/ )Description of the Communicator 2007 hotfix package: December 17, 2007
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.