Additionally, the Lync 2013 client displays the following error notification:
This issue may occur when the following conditions are true:
- The Lync 2013 client was updated to version 15.0.4517.1504 or 15.0.4535.1510.
- The Media Bypass feature for the Lync Server 2013 Enterprise Voice infrastructure is enabled.
- The Lync 2013 client's user makes a call and puts a remote PSTN user on hold by using the Lync 2013 Hold feature.
Article ID: 2904439 - Last Review: Nov 22, 2013 - Revision: 1