Symptoms: When attempting to start Skype for Business (2016), the splash screen shows briefly before disappearing. Lync.exe and Communicator.exe are not shown running in task manager. When you look in the Event Viewer, you receive Event 35 Side by Side error:
Activation context generation failed for "C:\Program Files (x86)\Microsoft Office\Root\Office16\lync.exe.Manifest".Error in manifest or policy file "C:\Program Files (x86)\Microsoft Office\Root\Office16\UccApi.DLL" on line 1. Component identity found in manifest does not match the identity of the component requested. Reference is UccApi,processorArchitecture="AMD64",type="win32",version="220.127.116.11". Definition is UccApi,processorArchitecture="x86",type="win32",version="18.104.22.168". Please use sxstrace.exe for detailed diagnosis.
Cause: Windows Internet Explorer 11 is not installed - Windows 7, Windows 7 SP1
Resolution: Install Windows Internet Explorer 11