Using New Outlook on Windows for personal email, calendar, and contact management
Hello Jeanne_C13,
Good day!
I have found more information upon further research on this issue! The initial version of PST support in the new Outlook for Windows is scheduled to start rolling out in March 2025. This will allow users to open and read emails within .pst files, although it will be read-only and limited to Mail items initially.
You can find more information about this feature and its current limitations in the Microsoft Roadmap -Microsoft 365 Roadmap | Microsoft 365. I've included the Feature ID and details below for your reference:
Feature ID: 399467
Product: Outlook
Platform: Desktop
Release phase: General Availability
Thank you again for your feedback, and I'm glad I could provide you with this update.
Sincerely
Eleni | Microsoft Community Moderator.