- You sign in to Microsoft Lync 2013 in an environment that has a proxy server deployed.
- You try to upload a PowerPoint presentation to a conference by using Lync 2013.
- There are no external DNS resolution and external HTTP connectivity that are through the proxy server.
Note The proxy authentication is not required, and you do not receive a 407 error.
Article ID: 2882812 - Last Review: Sep 21, 2013 - Revision: 1