There is only one file type that uses the .MFU extension:
MobileFrame Update File
File used by MobileFrame Desktop, an administration application for MobileFrame mobile application deployments; contains the information required to update all components of the MobileFrame system to a newer version of the software.
When upgrading the MobileFrame system software, the user imports an MFU file and the system automatically upgrades all servers, administrative tools, and clients to the latest version of the software.
Updated: May 5, 2011