How to Open a .PST file from the new outlook. File menu disapeared

this sucks, I need this function now

I completely feel for you all. I too hope that PST files will be supported in the new Outlook soon. Just to add:

It should be no problem to use both versions. I have both versions installed and run them in parallel. Don't use the switch button top-right, just start both and run both. I still mostly prefer "old", but I go to "new" to use Copilot features. I switch seamlessly. If I delete a mail in "old" it is instantly gone in the "new". Aaand I mount PSTs in the old.

This won't work if you use POP3, but then, really you need to step up. POP3 was a grossly outdated technology 10-20 years ago.

With a 365 or outlook.com/hotmail.com/live.com mailbox, it is no problem. With IMAP it should work too.

Microsoft is notorious for keep old technology propped up on adderal like an American president. So expect old Outlook to be available for a long time, at least two-three years I would guess.

But: All good things must come to pass. Outlook is based on code and technology from the 90s. One must expect it to die. No software lasts forever. PSTs are a totally proprietary format, so having a lot of business critical data stored in PSTs is a bit of a gamble. Anyone with half a tech brain would have known 10+ years ago that this day would come eventually. That is the difference between open and proprietary data formats. ZIP files or JPEGs or PDFs will forever be possible to open, because the formats are open. If you need someone to share your grief, and have a time machine, go back to the 90s and talk to e.g. those with Word Perfect or dBase files they couldn't fully read.

OTOH, like with WP and dBase files, expect a) Microsoft to provide means to import PST archives to the "cloud" (they already do), and b) 3rd parties to reverse-engineer the format and sell inexpensive apps to let you open those old PSTs (they already do).

I have explored and experimented with the "New Outlook" and, like many others commenting on this board, the lack of support for PST files is a huge problem. I see that I am not the only person with years of emails saved into PST files.

Does Microsoft monitor this board? Could they provide us with an update on where this stands? Switching back and forth from New Outlook to Classice Outlook is not a solution.

How do I turn off the try new outlook option. I don't have a toggle.

My solution in the end was to

• Uninstall Outlook
• Reinstall the prior Outlook release
• Access the PST file
• Drag every email over to freshly created folders under my inbox (now essentially on the cloud)

Took a full day.

The other thing that new Outlook does not seem to have is distribution lists. I have no solution for that other than forever using ReplyAll and editing the whole email.