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CloudHal RonaldvdMeer 

I was provided with 3 files and a regkey-to-delete, by the MS engineer as part of my premier support case. two files are typelibs (1 x 32bit and 1x64bit) plus the regtlib.exe to register the typelibs.

the regkey-to-delete, seems to remove the lync.exe typelib registration.

I assume that this all equates to alternative plumbing for the presence-in-outlook function.

uc.tlb = 64bit

uc.win32.tlb = 32bit

On a problematic machine, find the Office flavor (32 bit or 64 bit) and root of Office installation (e.g. C:\Program Files\Microsoft Office\root\Office16 for 64 bit Office, or C:\Program Files (x86)\Microsoft Office\root\Office16 for 32 bit Office);

Place the relevant typelib in the office16 folder.

Copy regtlib.exe to same location and run this command from an elevated command window to register UC Tyepelib (assume 64 bit):

C:\Program Files\Microsoft Office\root\Office16\regtlib uc.tlb

Delete this entry from Registry (right click on the GUID and select delete), if it exists:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Classes\TypeLib\{B9AA1F11-F480-4054-A84E-B5D9277E40A8}

Restart outlook