On a server running Exchange you can map the M:\ drive as a
network drive. Users can map local drives to any folder or mailbox
in the IFS hierarchy. After local drives are mapped, they can be
shared to give other users access to the databases.
The default IFS hierarchy contains the domain and two folders,
as follows:
\domain name
\Public Folders
\Mbx
You can list items in Public Folders by typing the dir
command at the DOS prompt. You can also perform other file system
operations, for example, COPY and DELETE, on files in Public
Folders. All standard message items are identified by .eml
extensions and can be opened with MAPI and IMAP clients.
The \Mbx folder is the root for all mailboxes on the Exchange
server. If you have permissions, you can access the mailboxes by
explicitly specifying mailbox names.