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.

Hi

I need to import a PST file into "NEW OUTLOOK" how can I do this ?

My Classic Outlook (365) has slowed to a crawl since an Insiders Win11 update several weeks ago. I have deleted empty folders, archived, cleaned-up and reset processor priority to high with a registry hack. Still, at times, a click on a mail or different account results in a 5 sec+ delay before action. "New Outlook" doesn't have that problem and that's the positive. But inability to open other pst files is a non-starter. Please comment on speed. I'm running SSD on a fast processor.

Any chance this Win11 Insider update can be temporarily uninstalled, or the OS system restored to a date before the update?

Not sure what your circumstance is but for me, I installed Office 2019 on a new staging of my PC. I found two Outlook options, Classic and New. I tried New and found many of the same problems described in this issue/complaint. I instead opened Outlook Classic and set up my email account, then imported my PST file into the new outlook profile. Everything returned.

See this link for using Outlook Classic if outlook is installed on your PC. https://answers.microsoft.com/en-us/outlook_com/forum/all/how-do-i-download-the-classic-version-of-outlook/f2e56ae5-e563-4929-85cb-a62869eb9866

Is this what I need to do, to make my contact groups from classic verision, work in the new Outlook. I have a service ticket open since friday Oct 18 and my issues have not been resolved. My groups have been changed to categories, but they do not auto fill to any emails. I started recreated my groups, and was able to complete maybe 6 and since then when I create a group it shows briefly and then disappears A video was requested yesterday, which I sent but have not recieve any response. So if doing the opt would help????.