Set Caching on an Outlook Microsoft Exchange account

When a Microsoft Exchange account is created in Outlook the cache or amount of contents of the mailbox is not the full content of the mailbox. Setting the cache to "All" assures Outlook has a complete copy of the Microsoft Exchange account mailbox contents saved locally on the computer. This is important if you want to assure all the contents of the mailbox is available to be exported to an Outlook pst file for a back up copy or later import into another email service such as NMU G Suite.
1. Open Outlook.
2. Go to "File", "Account Settings", "Account Settings".
3. The Account settings window will be displayed. Double click the "Microsoft Exchange" account to view its settings.
4. Slide the “Mail to keep” setting to “All”.

5. Click "Next", "Finish", and "Close".

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