When using GSuite GMail with Microsoft Outlook, you get this alert:
Your IMAP server wants to alert you to the following: Please log in via your web browser:
If you get the Please log in via your web browser error, then welcome to GSuite hell.
The best I can suggest is to try each of the options on the following article: https://support.google.com/mail/accounts/answer/78754
I never managed to fix this problem, myself. I’m not sure why it worked for several days before having this issue. ❗ I’ve since managed to fix the Please log in via your web browser error here:
This Setting Is Managed By Your Domain Administrator – Less Secure Apps
I’m left wondering if this is going to happen again, and glad I’m not rolling GSuite out to a large organisation!