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Troubleshooting › I Cannot Determine the Purpose of the M Drive

I Cannot Determine the Purpose of the M Drive

Valid in all Exchange Server systems.

Symptom

I cannot determine the purpose of the M drive and do not know if it needs to be backed up.

Solution

The M drive (ExIFS) is a virtual drive that exposes mailboxes and public folders. It is simply a view of the Exchange Server and not a physical drive, so you do not need to back it up, which is why it is skipped when you perform a backup job using the Client Agent for Windows.