While creating a full backup of the Exchange server, we do not recommend you back up the following directories and drives:
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Installable File System (IFS) drive
Important: If you back up an enabled IFS drive, your Exchange databases can be damaged. For more detailed information, refer to the Microsoft Knowledge Base at https://technet.microsoft.com/ru-ru/library/bb124669(v=EXCHG.65).aspx.
To avoid this type of damage, we do not recommend you enable the IFS Drive. -
Exchange databases and Log Files
Since the Exchange database and transaction log files are constantly changing, we recommend that you back them up by selecting the Microsoft Information Store option under Microsoft Exchange server in the NTBACKUP utility.
When creating the full backup, do not select the folder where Exchange database and logs are stored (by default,
\Exchsrvr\MDBDATA) in NTBACKUP, and clear the Microsoft Information Store check box (under the Microsoft Exchange Server node).Important: If the full backup includes drives or folders containing the Exchange database and transaction log files or the Exchange IFS drive (by default, drive M:), the files that are in use will not be backed up. Any attempts to restore this backup might cause problems.
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Cluster shared disk resources (if you are running Exchange on a cluster)
Usually you do not include the drives of the server cluster's shared disk resources in the full backup (for example, the drive where you store the quorum disk resource or the drives where you store the Exchange database files and log files). You must back up these resources by using the System State option and the Microsoft Information Store option in the backup.
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Removable drives
To save an amount of disk space for your Windows system or full backup set and the time required for backing up and restoring the system, do not back up a removable storage media (such as removable disk drives, floppy drives, CD-ROM drives and so on) as they are not a part of your Disaster Recovery strategy.