Using Classic Outlook on Windows for personal email, calendar, and contact management
I had the same problem with the NEW OUTLOOK. I could not view my old archived .pst files. However I just managed to find a much simpler solution. Windows allows us to install and use BOTH the NEW OUTLOOK and the CLASSIC OUTLOOK at the same time. The CLASSIC OUTLOOK was still on my computer (it was not deleted), and I was able to add the icon on my taskbar (I have two OUTLOOK icons on my taskbar now).
I opened the CLASSIC OUTLOOK from my taskbar icon, and voila! All my previous email accounts, and all my archived .pst data files were all visible and available there. So I have decided to keep the CLASSIC OUTLOOK for my old .pst archived data files, and use the NEW OUTLOOK for my email accounts.