Outlook OST files not being backed up in a full volume backup with Symantec System Recovery SSR).


Outlook OST files are not being backed up when a full volume-level backup is done using Symantec System Recovery (SSR).


By default, Outlook OST files are excluded from being backed up when a volume-level backup is done using Microsoft Volume Shadow Copy Service (VSS).

For more information, please refer to the FilesNotToSnapshot section here:



Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.

  1. Run REGEDIT
  2. Browse to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\BackupRestore\FilesNotToSnapshot
  3. Delete the entry for OutlookOST
  4. Restart the Symantec System Recovery service (or restart the machine)


The above solution is not recommended by Veritas and is only provided as a workaround to the issue. If you are in any doubt about making the above changes, Veritas recommends that you contact Microsoft Technical Support for guidance.

Terms of use for this information are found in Legal Notices.



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