Source:

http://support.microsoft.com/kb/2881070

Download:

• 32-bit – Download the 32-bit Lync update package now.
• 64-bit – Download the 64-bit Lync update package now.

This update resolves the following issues:

• 2985514 Lync 2013 signs out and then signs in every 30 minutes
• 2985513 Lync 2013 crashes when you manipulate a pivot table field during an Excel worksheet presentation
• 2985512 Error “Event ID from source Lync cannot be found” instead of event logs from Lync 2013 appears in Event Viewer
• 2981755 Cannot join a meeting by using Lync 2013 when the ACP MCU services are running on multiple front-end servers
• 2981754 Cannot send CER data when a user cannot join meetings in Lync 2013
• 2981753 Lync 2013 meeting issues after you install Lync Meeting Add-in for Office 2013
• 2981752 Cannot select audio device during a VoIP call in Lync 2013 when a user is enabled for RCC
• 2981751 Lync 2013 does not display telephone…