Users cannot join a meeting that is created by a user whose SIP address contains an apostrophe in a Lync Server 2010 environment

Applies to: Lync Server 2010 Enterprise EditionLync Server 2010 Standard Edition

Microsoft Lync Server 2010 does not support user SIP addresses that contain an apostrophe (') or a dash (-). 

More Information

If a user (user A) uses a SIP address that contains an apostrophe (') or a dash (-), user A may encounter the following:
  • A user (user B) cannot join a Lync Server 2010 meeting that is created by user A.
  • User A misses meetings on a Lync 2010 client.
This issue has been addressed as part of the Lync Server 2010 Web Conferencing Server cumulative update for June 2012.

2708616 Description of the cumulative update for Lync Server 2010, Web Conferencing Server: June 2012