You cannot use hands free mode in a call with a Common Area Phone that is running Lync 2010 Phone Edition

Symptoms

Consider the following scenario:

In this scenario, you cannot use hands free mode in a call, and there is no message to instruct you what to do next.

To resolve this issue, install the following cumulative update.

For Aastra 6721ip and Aastra 6725ip telephones:

2529978 Description of the cumulative update for Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip: April 2011

For Polycom CX500, Polycom CX600 and Polycom CX3000 telephones:

2529977 Description of the cumulative update for Lync 2010 Phone Edition for Polycom CX500, Polycom CX600 and Polycom CX3000: April 2011

After you apply this cumulative update, the following message is displayed on the telephone screen within the first 15 seconds of a call:

Please pick up and use the handset if you want to speak during this call.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about Common Area Phone, visit the following Microsoft website:

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