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.

It's not there. Many of the 'answers' here assume Outlook 365, NOT the desktop version, which is more than a little annoying. AFAIK this very basic, IMO, function is not available in the new/current Outlook desktop. Based on the history of this thread, which goes back over a year, I seriously doubt MS intends to fix it.

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.

Where is "FILE"? I don't seem to have that option after switching to the new Outlook. I have several different offline data-files that I used in the Old Outlook that did not come through when I switched to the new one. Only my main domain mailboxes came over. This is a detriment and makes using the new Outlook completely impractical. Yet in attempting to switch back to the old Outlook, I am somehow not receiving new emails and just keep getting a "Not Responding" lag. It's left me completely inoperable for work tasks for 6 hours thus far today.

(It says it inserted an image I'm trying to share of my menu bar - but I don't see it on my end, so going to hit submit and hope for the best).

Can anyone please answer this question.... Where is FILE in the new Outlook menu bar??

I cannot even do step one to access my previous Outlook Data Files (pst).

Also my previous old Outlook has just completely disappeared!!!

That suggests to me that there may be an issue with your M365 installation, you might consider repairing it, Start > Settings > Apps, find Microsoft 365 Apps in the list, click it, click Modify, and select either Quick or Online Repair. In my experience, Online Repair is more thorough. If the issue persists, please follow up here so we can dig deeper. If you can capture that random message in a screenshot, please consider posting it so we can have a look at it. Thanks!

If you buy a brand-new machine and buy an M365 subscription with it that includes Outlook, but you get Outlook New instead of Outlook Classic, the Classic is available for download here:

You can't open classic Outlook on a new Windows PC - Microsoft Support

If you purchase this new machine without an M365 subscription, it will come with Outlook New as this has replaced the Windows 10/11 Mail and Calendar app. I've seen no data indicating that the above link will not work in such case nor have I seen any costs listed.

thanks MS Moderator, how can i drag drop MULTIPLE archived emails from new online Outlook?

At the moment, any folder (eg INBOX, SENT) or “ARCHIVED” emails MS OUTLOOK can only be downloaded (drag drop) to my desktop ONE AT A TIME - no multiple selection?

For all online email movements, MS Outlook allows me to select more than one email.

Perhaps MS Outlook has a setting to switch from SINGLE to MULTIPLE emails?

My preference is keeping archived emails on my desktop and external hard drive.

Is MS forcing me to store multiple “private” emails on a MS server somewhere.

Can MS Outlook explain how to select multiple emails and drag/drop to my desktop or external hard drive …

thanks/cheers

Max