Symptoms
Consider the following scenario:
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User A and user B are Microsoft Lync 2010 users. The users are enabled to use Enterprise Voice.
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User A and user B start an instant message conversation.
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User A and user B start a video call in the conversation.
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User A does not use the keyboard and mouse for several minutes.
In this scenario, user B receives a warning message that states user A is using a device that cannot receive IMs.
Resolution
To resolve this issue, install the following cumulative update:
2514982 Description of the cumulative update for Lync 2010: November 2011
