Error "400 Bad Request" when a user whose display name contains double quotation mark calls a PSTN number in Lync 2013


Consider the following scenario:

  • You deploy the Enterprise Voice feature in a Microsoft Lync Server 2013 environment.

  • You configure the display name of an Enterprise Voice enabled user to contain double quotation mark as the gershayim symbol, such as ד" ר ערן הראל.

  • The user tries to call a public switched telephone network (PSTN) number by using Lync 2013.

In this situation, the user cannot call a PSTN number. Additionally, the user receives the following error message:

400 Bad Request


This issue occurs because the double quotation mark is encoded incorrectly.


To resolve this issue, install the following update:

3001616 October 2014 Cumulative Update 5.0.8308.831 for Lync Server 2013 (Front End Server and Edge Server)

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