Q. I'm trying to install Lync Server 2010 on my Windows Server 2008 R2 SP1 installation, but the Setup or Remove Lync Server Components in the Deploy part of installation fails with a prerequisite Wmf2008R2 failure. What can I do?

A. Windows Server 2008 R2 SP1 changed the package version of the Windows Media Format runtime, and Lync setup is looking for the pre-SP1 version.

The solution is to manually add the Windows Media Format runtime package from an elevated command prompt. Use the command

%systemroot%system32dism.exe /online /add-package /packagepath:%windir%servicingPackagesMicrosoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.1.7601.17514.mum /ignorecheck

Once the reboot is complete, restart the Lync Server 2010 installation and you'll get past the Wmf2008R2 prerequisite failure.