The authorization panel appears, I fill in username and password, and it redirects to https://login.microsoftonline.com/common/oauth2/nativeclient?code=… and hangs there indefinitely. If I use the “open in browser” button, my browser (Vivaldi) opens with a blank page.
Did OAUTH2 authorization with Outlook work when using previous versions of TB?
I ask because in 10.2 the redirection method seems to have been changed: "Google OAUTH is now performed via localhost Redirect URI as OOB redirection is going to be disabled by Google". That may have something to do with it.
Same issue as OP with v10.2, reinstalled v10.0.10 and oauth worked again for me. So looks like the changes to oauth2 in 10.2 redirects causes some problems with outlook accounts