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.
- Run REGEDIT
- Browse to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\BackupRestore\FilesNotToSnapshot
- Delete the entry for OutlookOST
- 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.