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ITsVISTA KB-Link: KB946886

A video call may fail when you try to start the video call by using Office Communicator on a computer that is running Windows Server 2008 or Windows Vista

When you try to start a video call by using Microsoft Office Communicator on a computer that is running Windows Server 2008 or Windows Vista, the video call may fail.

This problem may occur when a third-party legacy Transport Driver Interface (TDI) filter driver is installed on the computer. TDI filter drivers may be used by some antivirus software.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB946886.

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