Microsoft Communicator Changelog
What's new in Microsoft Communicator 13.1.3
Feb 3, 2012- Adds support for Juniper and Cisco VPN clients. This update also fixes an issue with the ServerAddressInternal managed preference setting.
New in Microsoft Communicator 13.1.2 (Aug 4, 2011)
- Resolves an issue that causes Microsoft Communicator for Mac 2011 running on Mac OS 10.7 (Lion) to crash when you send an IM or start an audio call or a visual call.