By default, Outlook offline file (.ost) is excluded from VSS-enabled snapshot.
Therefore, full backup using ActiveImage Protector 2018 does not create (.ost) file in the backup image file.
Please delete the following value by using registry editor.
* Deleting the registry setting of the file excluded from VSS enables backing up. The setting may be changed at the sole risk of the customer.
- ActiveImage Protector 2018/2016