Lync Server Installation Error: Prerequisite installation failed: Wmf2008R2

Trying to Install Lync 2010 on Server 2008 R2 SP1, the installation failed with the following error while adding the first Lync Server Components:

Update: I Initially published this post in March, when I first encountered this issue.
My workaround was to rename the files names as you can see below if you read further.

The official workaround for this issue has been released in Microsoft KB2522454. To sum it up, you should run the following command before installing Lync and reboot:

%systemroot%\system32\dism.exe /online /add-package /packagepath:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.1.7601.17514.mum /ignorecheck

You can read further on if you wish….

It appears as if that file:
Cannot be found.
I looked for that file. It’s no where to be found. But it looks like it has a different version:

I copied the file name mentioned in the error message, changed both file names (both .cat and .mum, didn’t know if they need each other during installation) and tried installing again.

That Solved the problem:

I changed back the file names to their original names and restated the server – everything works fine.
Perhaps a Lync Server 2010 RU1 soon?

11 thoughts on “Lync Server Installation Error: Prerequisite installation failed: Wmf2008R2

  1. The problem is that the WMF package version has changed for Windows Server 2008 R2 SP1.
    The proper workaround is to run from an elevated cmd window (applicable to Front End server with Media workloads)

    %systemroot%\system32\dism.exe /online /add-package /packagepath:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.1.7601.17514.mum /ignorecheck


    The Lync setup check will detect that the a proper version is installed and will proceed

    Peter (Microsoft Lync Server team)

  2. This prerequisite check will invariablly fail if requirements for Windows Media Format Runtime were not met on the intended Lync Server 2010 Front End:

    Windows Media Format Runtime Requirements
    All Front End Servers and Standard Edition servers where conferencing will be deployed must have the Windows Media Format Runtime installed. The Windows Media Format Runtime is required to run the Windows Media Audio (.wma) files that the Call Park, Announcement, and Response Group applications play for announcements and music.

    We recommend that you install Windows Media Format Runtime before you install Lync Server 2010. If Lync Server 2010 does not find this software on the server, it will prompt you to install it and then you must restart the server to complete installation.

    To install the Windows Media Format Runtime on servers running Windows Server 2008 R2, use the following command:

    %systemroot%\system32\dism.exe /online /add-package /packagepath:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.1.7600.16385.mum /ignorecheck

    To install the Windows Media Format Runtime on servers running Windows Server 2008, use the following command:

    %systemroot%\system32\pkgmgr.exe /quiet /ip /m:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.0.6001.18000.mum

  3. Rename the file is not the better solution go to the link Technet of Ty copy the correct line for your OS restart your computer and it’s good !!

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