Using Classic Outlook on Windows for personal email, calendar, and contact management
I have fallen back on the Office 16 version of Outlook. It works reliably for me with my existing btinternet e-mail address. I could not find any way to add this to the 365 integrated version: no tab or three dots etc. I read elsewhere that Microsoft are now only allowing gmail additions to the 365 Outlook, but Bing claims btinternet should work. My gmail address certainly works on the 365 version.