When installing a MAgE hotfix manually, the installer fails to stop the MAPI Assistant component (4266291)

In some scenarios, where it may be required to manually copy the .msp file from a QMMEX hotfix to update a MAgE agent host, the following error was presented in the installer:

Cannot stop the Quest Migration Agent for Exchange MAPI Assistant component 

When trying to stop the Exchange MAPI Assistant manually under Administrative Tools > Component Services > My Computer > COM+ Applications, the following error may be presented as well:

Error code 80004002 - No such interface supported.