New Outlook for Windows users will be able to group messages as a conversation for emails within Outlook Data File (.pst or Personal Storage Table file). Future releases of new Outlook for Windows will expand the support for .pst file capabilities.
This message is associated with Microsoft 365 Roadmap ID 479412.
When this will happen:
Targeted Release: We will begin rolling out early February 2025 and expect to complete by mid-March 2025.
General Availability (Worldwide): We will begin rolling out mid-March 2025 and expect to complete by early April 2025.
General Availability (GCC): We will begin rolling out early April 2025 and expect to complete by early May 2025
How this will affect your organization:
Outlook Data File (.pst) support is enabled by default in new Outlook for Windows. If you organization wants to block or limit Outlook Data File support, set the OutlookDataFile mailbox policy. Learn more: Set-OwaMailboxPolicy (ExchangePowerShell)
What you need to do to prepare:
This rollout will happen automatically by the specified date with no admin action required. You may want to notify your users about this change and update any relevant documentation.
Before rollout, we will update this post with revised documentation.
#newoutlookforwindows