This article describes the best practices on how to backup .PST files.
A Personal Folders file (.pst) is an Outlook data file that stores the messages and other items on the computer. Since .PST files are regularly pretty large, we do not recommend backing up .PST files with ShareSync. End-user mailboxes are usually backed up by the mail provider. Also, in most cases, Outlook desktop clients are configured in Cached Mode, which means that the local PST file only has a subset (last couple of months) of the mail items in the mailbox. As such, a backup of the local PST file would not facilitate a full mailbox backup.
A PST file is also a database file which changes frequently, and thus is not a good fit for a real-time backup. This file type is excluded by default.
It is recommended to use the Outlook Backup feature in order to backup .PST files. Outlook Backup is an optional feature and is available in CONTROL PANEL > Services > Outlook Backup.
Read the Knowledge Base article on Overview Of Outlook Backup for more information.
To prevent ShareSync storage issues, we recommend modifying the Backup Policy and using the File Type Exclusions feature to prevent users from keeping .PST files in ShareSync.
You can manage File Type Exclusions in CONTROL PANEL > Services > ShareSync > Policies > Backup policy > File Type Exclusions.
Alternatively, it is possible to exclude folders that have .PST files from real-time backup by modifying the Folder Path Exclusions in CONTROL PANEL> Services > ShareSync > Policies > Backup policy > Folder Path Exclusions.
Read the Knowledge Base article on ShareSync: Backup Policy (Admin Guide) for more information.