MEM – ‘mfc120.dll’ is missing when extending AD schema for ConfigMgr

Hi all, I ran into the following issue when attempting to extend the AD schema for a new ConfigMgr installation for a client this week and I wanted to share the resolution, albeit, a simple one.


When I attempted to extend the AD schema on the Schema Master server, I came across this error when running extadsch.exe:


Download and install Visual C++ Redistributable Packages for Visual Studio 2013, ensure you select the correct architecture:

Once installed, run the extadsch.exe from an administrative command prompt and note the successful status return:

To double check that the schema has indeed been extended, open adsiedit.msc, connect to the Schema naming context:

Check to see if the following entries are present:

If the entries are present, the schema has been successfully extended.