MC1104309 - New Microsoft Outlook for Windows: Export from mailbox to PST

Coming soon for new Microsoft Outlook for Windows:

1. Users will be able to export an entire mailbox (emails, calendars, and contacts) or a specific mailbox folder to a .pst file. This feature is associated with Microsoft 365 Roadmap ID 485737 (Worldwide audience) and Microsoft 365 Roadmap ID 485738 (GCC audience).
2. Users will be able to schedule an export of an entire mailbox (emails, calendars, and contacts) or a specific mailbox folder to a .pst file. This feature is associated with Microsoft 365 Roadmap ID 485743 (Worldwide audience) and Microsoft 365 Roadmap ID 485744 (GCC audience).

When this will happen:

Ability to export an entire mailbox (Roadmap ID 485737 for Worldwide and Microsoft 365 Roadmap ID 485738 for GCC):

• Targeted Release: Available now.
• General Availability (Worldwide): We will begin rolling out mid-July 2025 and expect to complete by mid-August 2025.
• General Availability (GCC): We will begin rolling out late August 2025 and expect to complete by early September 2025.

Ability to schedule an export of an entire mailbox (Roadmap ID 485743 for Worldwide and Microsoft 365 Roadmap ID 485744 for GCC):

• Targeted Release: We will begin rolling out early July 2025 and expect to complete by late July 2025.
• General Availability (Worldwide): We will begin rolling out early August 2025 and expect to complete by early September 2025.
• General Availability (GCC): We will begin rolling out late September 2025 and expect to complete by early October 2025.

How this will affect your organization:

Before this rollout, Outlook Data File (.pst) support is enabled by default in new Outlook for Windows, and this default state will persist after the rollout. If you want to block or limit Outlook Data File support for your organization, set the OutlookDataFile mailbox policy. Learn more: Set-OwaMailboxPolicy (ExchangePowerShell) | Microsoft Learn

NOTE: The group policy used to control Outlook Data File (.pst) in classic Microsoft Outlook for Windows desktop is not the correct mechanism for controlling Outlook Data Files in new Outlook for Windows. You must set the OutlookDataFile mailbox policy to control this file type in new Outlook for Windows.

What you need to do to prepare:

This rollout will happen automatically by the specified date. Review the OutlookDataFile mailbox policy to ensure it is set to align with your organization’s desired behavior. You may also want to notify your users about this change and update any relevant documentation.

Learn more: Open and find items in an Outlook Data File (.pst) - Microsoft Support (will be updated before rollout)

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