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drive:\Users\\AppData\Local\Microsoft\Forms.drive:\Program Files (x86)\Common Files\ Microsoft Shared\Stationery.

drive:\Program Files\Common Files\Microsoft Shared\Stationery.Stationery (can be in two different locations depending on whether you have the 32-bit/64-bit Outlook).drive:\Users\\AppData\Roaming\Microsoft\Signatures.drive:\Users\\AppData\Roaming\Microsoft\Outlook\Outlprnt.drive:\Users\\AppData\Local\Microsoft\Outlook.Email, calendar, contact, task and notes information for POP and IMAP accounts (.pst.drive:\Users\\AppData\Roaming\Microsoft\Outlook\profile name.xml.The path for each file/folder that needs to be backed up is mentioned below: Therefore, it is still preferable to regenerate an OST file instead of restoring it."*

For example, after restoring an OST, the computer detects a new version of the OST file on the computer, it will force you to delete, and the regenerate the local OST file. We delete OST file from the shadow copy before the image is created. In addition, the OST files can be regenerated. Even though we have worked to reduce the impact of copy-on-writes on shadow copies, a heavily churned file such as OST file still cause problems on the computer. If the OST changes were kept in shadow copies, then Outlook writes to the OST files is copy on write I/O hit (2 writes, 1 read)every time. So the backup process will impact the performance on the computer. Everyday I/O will write to the OST file when Outlook is running. The time-consuming work at backup time is backing up the OST files as part of the image. ost files: *"Maintaining changes to OST files within shadow copies is expensive in terms of space and I/O activity. This is the Microsoft position regarding.