Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. Can't join a meeting when proxy authentication is required in Lync 2010

Can't join a meeting when proxy authentication is required in Lync 2010

View products that this article applies to.

Symptoms

Consider the following scenario:
  • A proxy server that requires all outgoing web access requests to be authenticated is deployed in an organization.
  • You sign in to Microsoft Lync 2010.
  • A Lync 2010 user in a non-federated organization sends you a meeting invitation. The invitation enables anonymous users to join the meeting.
  • You try to join the meeting.
In this scenario, you encounter a 407 error from the proxy server. Additionally, you receive the following error message: 
Cannot sign in because the server is temporarily unavailable.

error ID 28 (source ID 238).

↑ Back to the top

Resolution

To resolve this issue, install the following cumulative update:
2842627 Description of the cumulative update package for Lync 2010: July 2013

Note After you install the update, if you try to join a meeting, you are prompted to enter credentials.

↑ Back to the top

Keywords: kbqfe, kbfix, kberrmsg, kbsurveynew, kbexpertisebeginner, kb

↑ Back to the top

Article Info
Article ID : 2861312
Revision : 1
Created on : 1/7/2017
Published on : 7/12/2013
Exists online : False
Views : 265