However, it was much more complicated than that. I incorrectly assumed that all I had to do was buy an Office 2021 key, download and run the Office 2021 installation program and I’d be done. I’m glad I did because it turned out to be very much like my old Outlook. I chose Outlook 2021 (part of Office 2021) because it’s very similar to my Outlook 2013. In my case, I was very comfortable with my old Outlook version and wanted to continue with Outlook, assuming I could maintain all my previous Outlook email and data. For example, I know that the current version of the free Mozilla Thunderbird can use the OAuth 2.0 authentication mentioned in the Google email above. Using another app to replace your outdated Outlook is a possibility. I found lots of Internet websites selling Office 2021 keys for far less cost than Microsoft.

To avoid no longer being able to use it after May 29th, I upgraded to Office 2021. In my case, I received the email above because I was using Outlook 2013. If your version of Microsoft Office is Office 2016 or older, you probably received this email:

If you are using Outlook with Gmail, you might need to take action by May 30, 2022.

Pop3 gmail account in outlook 2013