Lync 2013 version15.0.4551.1005 (November Update)

Microsoft has released a new Cumulative Update for Lync 2013 Client couple days ago. This fix addressed bunch of issues including,

  • Presence status isn’t updated based on Exchange calendar in Lync 2013
  • You can’t drag a contact from Lync 2013 to another application
  • Proxy authentication dialog box appears when you sign in to Lync 2013

Note that once updated, there is a known issue with this fix.

  • Screen readers cannot read aloud keystrokes during a Lync 2013 application or desktop sharing session in Windows

Before applying the CU Update, Verify that below prerequisites are installed.

  • MSO (KB2727096)
  • MSORES (KB2817624)
  • IDCRL (KB2817626)

You can download above patches and the CU update from


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