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Consider the following scenario:

In this scenario, you receive the following error message:

Problem Event Name: APPCRASH
Application Name: lync.exe
Application Version: XX.X.XXXX.XXXX
Application Timestamp: 53c5caa5
Fault Module Name: Uc.dll
Fault Module Version: XX.X.XXXX.XXXX
Fault Module Timestamp: 53c5df18
Exception Code: c0000005
Exception Offset: 0000000000231bdd
OS Version: X.X.XXXX.X.X.X.XXX.X
Locale ID: 2057


To fix this issue, install the September 8, security 2015 update (KB3085500) for Lync 2013 (Skype for Business).

Note Lync 2013 was upgraded to Skype for Business in April 2015.

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