Is Microsoft Outlook Finally Becoming the Classic Version Users Actually Want?

Microsoft Outlook advanced PST support rollout signals genuine commitment to closing feature gap with classic platform.

Microsoft has taken a significant step toward closing the feature gap between its newly redesigned Outlook and the classic version by fully launching advanced .PST file support. The release date of integrating new features for facilitating .PST files into New Outlook was just recently made public by Microsoft after being delivered via their Microsoft Feedback forum. This announcement is the culmination of a long/steady process of developing these requested capabilities over 12 months. Not only does the announcement represent a significant improvement for New Outlook users that have been frustrated due to limited capabilities offered by New Outlook, but also marks an important development for Microsoft. Since June 2025 Microsoft has been adding monthly updates to introduce 1 or more .PST related features each month. Initially the feature set was minimal to start and lacked some of the most basic functionality, including the inability for users to search/email content and/or senders in folders they created after importing .PST files from different sources. The release today will finally provide users with the ability to use/explore .PST management tools that they have had for a while.

To use the new expanded .PST Support, the user simply needs to go to the Settings menu in New Outlook, then choose Data files, then hit "Add files", then select the .PST file, which will make it accessible in their Folder List. One important note for users—Classic Outlook must remain installed under the hood at all times, and the two types of Outlook must match in terms of architecture; either both need to be 32-bit or both 64-bit. Microsoft has indicated that they plan to eliminate this architecture compatibility requirement in 2026.

The development timeline reveals Microsoft's commitment to functionality parity. June 2025 brought mailbox export capabilities, followed by automated export scheduling in July. August introduced read-only access to calendars, events, and contacts, while September added the ability to move emails in PST as attachments. March 2026 saw the arrival of PST file imports, with the current June/July 2026 release expanding this to calendar and contact imports.

Beyond .PST improvements, Microsoft is addressing other longstanding complaints about New Outlook. The company is implementing a confirmation prompt for calendar event modifications, allowing users to choose between saving changes or sending updates to all attendees. Currently, New Outlook automatically notifies all attendees whenever any change is made to a meeting—even minor description edits—creating unnecessary email floods.

New Outlook's interface simplicity remains its biggest selling point, attracting users tired of Classic Outlook's cluttered design. However, the absence of advanced features has created a contentious relationship among power users across Windows and macOS platforms. These latest updates, combined with the planned removal of the Classic Outlook dependency, suggest Microsoft is serious about making New Outlook genuinely competitive with its predecessor. Once the Classic Outlook requirement is eliminated and bulk import capabilities are fully deployed, Microsoft has stated it will cease .PST development. This positions the platform for its next evolution, with developers focusing on other capability gaps identified through user feedback.

Business Honor is of the view that Microsoft's advanced .PST support implementation represents a strategic commitment to operational feature parity and user experience reconciliation across Outlook platforms.

Frequently Asked Questions

Q: What is advanced PST support in Microsoft Outlook?

A: It allows users to import, export, and manage email files from PST backup files directly.

Q: Do I still need Classic Outlook installed to use PST files?

A: Yes, currently Classic Outlook must be installed in the background, but Microsoft will remove this requirement later 2026.

Q: Can I search emails in imported PST files?

A: Yes, advanced PST support now enables full email search by content, sender, and other criteria in folders.

Q: Will I be able to import calendars and contacts from PST files?

A: Yes, calendar and contact imports from PST files are rolling out in June and July 2026.

Q: When will Microsoft stop developing PST features?

A: After Classic Outlook dependency is removed and bulk imports are deployed, Microsoft will cease PST development.