You cannot apply high-contrast mode after you switched languages on a telephone that is running Lync 2010 Phone Edition

Symptoms

Consider the following scenario:

You have a telephone that is running Microsoft Lync 2010 Phone Edition.
You deploy new updates to the telephone from the update server.
You restart the telephone, and then you select a language when you sign in to the telephone.
You enable high-contrast mode.
You disable high-contrastmode, and then you switch to another language.
You try to enable high-contrast mode.

In this scenario, the high-contrast mode is not applied until you repower the telephone.

To resolve this issue, install the following cumulative update:

For Polycom CX500, Polycom CX600 and Polycom CX3000 telephones:

2577594 Description of the cumulative update for Lync 2010 Phone Edition for Polycom CX500, Polycom CX600, and Polycom CX3000: July 2011

For Aastra 6721ip and Aastra 6725ip telephones:

2577595 Description of the cumulative update for Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip: July 2011

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