The default email client on e os is a little bit tricky, depending on whether you’ve locked down your browser or not…I experienced problems getting OAuth to work with until I reset my browser to its defaults and tried again (I had locked down a lot of browser settings). This could be one reason. The other reason it won’t work is because the default options in the dialog boxes are the wrong ports, no server name, and wrong auth type, so nothing works without tweaking each option. Please try this:
I followed these steps:
Type in your hotmail/outlook address and hit next.
Server is outlook.office365.com.
Security is SSL/TLS.
Port is 993.
Authentication is OAuth 2.0.
Username is your email address, then hit next.
You will then see a page with a big blue “SIGN IN” button, tap that and it opens a browser window.
You will then see a Microsoft login page “Verify your email”, underneath this is “Use your password”, tap that.
Now enter your password and tap Next.
It may prompt for “Setting up your passkey…”, tap Next.
It will check incoming server settings now, and should show you the tiny green tick for incoming settings, and it should say incoming settings are valid.
It will then prompt for outgoing server settings:
Server: smtp-mail.outlook.com
Security: StartTLS
Port: 587
Authentication: OAuth 2.0.
Username: Your email address.
Tap Next and it should then say that outgoing settings are valid with the tiny green tick.
That should be all set up now.
Please let me know if this works. I have taken screenshots so can post them if anyone is keen.