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How to Archive Outlook Emails in Exchange Online vs Exchange On-Premises
Question details
The user needs to understand how to properly archive emails in Outlook and clarify the differences in archiving methods between Exchange Online and Exchange On-Premises.
- Product
- Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Managing mailbox storage and archiving messages depending on the type of Exchange server hosting the account.
- Observed behavior
- Exchange Online relies on administrator-controlled online archives without a registry setting to force local PST use, whereas Exchange On-Premises mailboxes support local PST archiving.
Verify with your IT department whether your email account is hosted on Exchange Online (Microsoft 365) or an Exchange On-Premises server, as this determines your available archiving methods.
Use PST Files for Exchange On-Premises Archiving
Create and use a local PST data file to archive messages if your account is hosted on an Exchange On-Premises server.
For traditional Exchange On-Premises environments, local archiving using Personal Storage Table (PST) files remains fully supported. You can manually create a PST file to move messages off the server and store them locally on your computer.
Launch Outlook, click on the 'File' tab in the top-left corner, select 'Info', and then click 'Account Settings' followed by 'Account Settings' from the dropdown menu.
In the Account Settings window, switch to the 'Data Files' tab and click the 'Add' button to create a new Outlook Data File (.pst).
Choose a memorable name for your archive file (e.g., 'Local Archive 2023'), select a secure location on your local drive, and click 'OK'.
Your new PST file will now appear in the Outlook folder pane. You can manually drag and drop emails from your main Exchange inbox into this folder to archive them.
Manage Online Archives for Exchange Online
Utilize Microsoft 365 In-Place Archives and retention policies instead of local PST files for Exchange Online accounts.
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Frequently Asked Questions
Can I force Exchange Online to archive to a local PST using the Windows Registry?
No, Microsoft Outlook does not provide a registry setting that forces local PST archiving for Exchange Online accounts. Exchange Online is designed to utilize cloud-based Online Archives managed by your organization's IT administrators.
Why is the Online Archive folder missing from my Outlook?
The Online Archive folder only appears if your Microsoft 365 administrator has enabled the archive mailbox feature for your specific account, and if your organization's subscription plan supports it. You will need to contact your IT support to request access.
Can I still export my Exchange Online emails to a PST file?
Yes, you can manually export your mailbox data to a PST file via the 'Export' feature in Outlook for backup purposes. However, using a PST file as an active, connected auto-archive destination for Exchange Online is not supported by standard Microsoft 365 retention policies.
