How can I mount a data file (pst) in new outlook. In the classic version this is doable through the File menu which is not available in new outlook.

Sure, apologies - I was on W11 23H2 and had problems upgrading to W11 24H2. The problem below is the one I'm describing.

I downloaded the free tool numerous people recommended and it showed that my reserved space was @ 93% full. Whereas using the diskmgmnt.msc, it showed 100% free....go figure. I followed the Cmd instructions on how to clear the fonts from the reserved fonts dir and it freed-up about 25%. I rebooted and tried again, it took about an hour for the full process to run and restart. (HP Z Book with i7 processor). However, my Surface Pro and MSI Cubi 5 devices were also running W11 23H2 upgraded without issues.

Yes, I'm talking about the standard windows desktop and the latest M365 Outlook.

Following the upgrade to 24H2, it forced me to start the new Outlook so I checked the .pst issue and found out it had been resolved per my update.

Cheers

MC

Hi anon151,

Good day.

Thank you for posting to the Microsoft Community. We are glad to assist.

I understand your concern regarding mounting a PST file in the new version of Outlook. Unfortunately, the new Outlook for Windows does not currently support direct access to PST files. However, I’ll provide you with alternative steps to achieve your goal:

Import from an External PST File:

• Click on File in the Outlook menu bar.
• Select Open & Export > Import/Export.
• Choose Import from another program or file and click Next.
• Select Outlook Data File (.pst) and click Next.
• Browse to the location of your PST file and select it.
• If the PST file has a password, enter it and click OK.

Use OST Files:

• The new version of Outlook uses a different file format called OST (Outlook Offline Data File) instead of PST.
• OST files serve a similar purpose as PST files and store email messages, contacts, and other data.
• When you connect your Outlook account to an Exchange server, it automatically creates an OST file for offline access.
• You can’t directly create an OST file, but it’s automatically generated when you set up an Exchange account in Outlook.

Provide Feedback:

• Since the new Outlook is still under development, many features are not fully functional.
• If you have suggestions or need specific features, you can provide feedback by selecting Help and choosing Support orFeedback.

In summary, while direct PST file access is not available in the new Outlook, you can import data from an external PST file or work with OST files.

I hope this helps let me know if this is contrary to what you need, I would still be helpful to answer more of your questions .

Best Regards

Community Moderator

This is not an option.

My PST files are huge. There are mails in there that are very old.

It is easy to back-up as a PST file and not too big for the mail servers.

Importing as OST is not possible.

Just bring back the PST files. That's what your customers want.

This is absolute BS. This person should NOT be a moderator. How are you supposed to access an "external" pst when there is NO file option on the menu. Please cleanup this answer and quit wasting our time. The ONLY way I have found to bring in contents from a pst file is to move those folders into the email account which the new Outlook accesses. I have been able to gain access to those folders with that workaround but there is no way of accessing an external pst file when there is no file option on the menu.

Hi anon151,

Good day.

Thank you for posting to the Microsoft Community. We are glad to assist.

I understand your concern regarding mounting a PST file in the new version of Outlook. Unfortunately, the new Outlook for Windows does not currently support direct access to PST files. However, I’ll provide you with alternative steps to achieve your goal:

Import from an External PST File:

• Click on File in the Outlook menu bar.
• Select Open & Export > Import/Export.
• Choose Import from another program or file and click Next.
• Select Outlook Data File (.pst) and click Next.
• Browse to the location of your PST file and select it.
• If the PST file has a password, enter it and click OK.

Use OST Files:

• The new version of Outlook uses a different file format called OST (Outlook Offline Data File) instead of PST.
• OST files serve a similar purpose as PST files and store email messages, contacts, and other data.
• When you connect your Outlook account to an Exchange server, it automatically creates an OST file for offline access.
• You can’t directly create an OST file, but it’s automatically generated when you set up an Exchange account in Outlook.

Provide Feedback:

• Since the new Outlook is still under development, many features are not fully functional.
• If you have suggestions or need specific features, you can provide feedback by selecting Help and choosing Support orFeedback.

In summary, while direct PST file access is not available in the new Outlook, you can import data from an external PST file or work with OST files.

I hope this helps let me know if this is contrary to what you need, I would still be helpful to answer more of your questions .

Best Regards

Community Moderator

This is not an option.

My PST files are huge. There are mails in there that are very old.

It is easy to back-up as a PST file and not too big for the mail servers.

Importing as OST is not possible.

Just bring back the PST files. That's what your customers want.

In Microsoft 365, it is not working either. I'm not going to the new version if the PST files are not working.

I have a lifetime of emails in my PST files.

Importing is no option, because it is way to big.

If you add a PST this way you cannot reply/forward or copy/move any emails in/out.

Thanks