The Exchange 2000 Installable File System (IFS) drive provides a file system interface to your mailbox and public folder stores by presenting the database contents under a drive letter designated for Exchange content. This is typically M, or the first drive letter available after M. The IFS drive provides access to mailbox and public folder content as if the data exists as individual file objects in a file system. Applications such as Windows Explorer and Microsoft Office can save data to or read data from this drive letter.

Important Do not attempt to back up or use an anti-virus scanner against the Exchange IFS drive. Doing so may cause problems with calendaring, attachment and message access, the Exchange 2000 Server database, and also may result in mail flow issues.
Back up a server running Exchange 2000 with a utility that works in conjunction with Exchange 2000 (such as the Windows 2000 Backup utility). Also, ensure that the server is running an anti-virus program that is functional with Exchange 2000.

The information in this article applies to:

• Microsoft Exchange Server 2003 Enterprise Edition
• Microsoft Exchange Server 2003 Standard Edition
• Microsoft Windows Small Business Server 2003, Premium Edition
• Microsoft Windows Small Business Server 2003, Standard Edition
• Microsoft Exchange 2000 Server