Symptoms
Consider the following scenario:
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User A is a delegate of user B.
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The Enterprise Voice feature is enabled for both user A and user B.
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User A signs in to a Lync 2013 client on a computer.
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User A signs in to Lync Phone Edition on a telephone. The telephone is connected to the computer by using a USB cable and is paired with the Lync 2013 client.
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User A tries to make a call on behalf of user B.
In this scenario, the call fails immediately.
Resolution
To resolve the issue, install the following cumulative update:
2812461 Description of the Lync 2013 updates: February 2013
More Information
For more information about how to act as a delegate, go to the following Microsoft website: :