Lync will not start any more. (Network Steve Forum)

Lync will not start any more.

On my Lenovo Thinkpad Yoga 64 bit laptop I used the MS Lync App and everything was working fine.
Then my company (University) offered Office 365 and I downloaded the 32 bit version (recommended)
I had 2 versions of Lync working. Until recently. :(

2 weeks ago I saw a window when I started my laptop that mentioned "Skype for business" and I was excited to see the new interface / improvements but alas it did not start. I tried to use the Lync App, but that one stopped working too.

I looked in the event viewer and saw 2 notifications.

1. Event ID 35 Source SideBySide

Activation context generation failed for "C:\Program Files\Microsoft Office 15\root\office15\lync.exe.Manifest".Error in manifest or policy file "C:\Program Files\Microsoft Office 15\root\office15\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="15.0.0.0". Definition is UccApi,processorArchitecture="x86",type="win32",version="15.0.0.0". Please use sxstrace.exe for detailed diagnosis.

2. Event ID 1000 Source Application Error.

Faulting application name: lync.exe, version: 15.0.4719.1000, time stamp: 0x552cf129
Faulting module name: ntdll.dll, version: 6.3.9600.17736, time stamp: 0x550f42c2
Exception code: 0xc0000005
Fault offset: 0x0001df63
Faulting process id: 0x1890
Faulting application start time: 0x01d09b000e7aa5be
Faulting application path: C:\Program Files\Microsoft Office 15\root\office15\lync.exe
Faulting module path: C:\windows\SYSTEM32\ntdll.dll
Report Id: 5026cc90-06f3-11e5-82d6-ac7ba14cb331
Faulting package full name:
Faulting package-relative application ID:

I tried uninstalling all and do a reinstall.
Also tried the 64 bit version of Office 365. (That give a slightly different error, but wont start either)

I hope that someone can help me on this one.

May 31st, 2015 8:04am

Hi Richard van den Berg,

You may try the following suggestions.

1. Uninstall all Lync App and Office365 components, and then reinstall Lync Windows App and test.

2. Uninstall all Lync App and Office365 components, and then reinstall Office365 64bit version.

When running Lync on a 64-bit Windows Operating System, Side-By-Side of .NET framework prefer to load 64-bit DLL(s), if you install 32-bit Office, the installation wizard would release a 32-bit DLL and a file LYNC.EXE.MANIFEST defines that a 32-bit UccApi.dll is needed, its different from what the Side-By-Side requested by default, so Side-By-Side throws the error.

3. Update or reinstall .Net Framework.

4. Remove the below lines from the Manifest file from "C:\Program Files (x86)\Microsoft Office\Office15\lync.exe.Manifest"

</dependentAssembly>

</dependency>

Hope this can be helpful.

Best regards,

Eric

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May 31st, 2015 11:27pm

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