Hi dear community, recently, a client company which provided me with an Exchange mailbox switched to "modern authentication", which caused my old configuration not to work any longer. I tried to change authentication method from "standard password" to "oauth2", as I have done it before with others, but I face a weirdly display password prompt (see screenshot1), with no field nor "ok" button. Moreover, console contains error messages (see screenshot2) that I am not able to understand, but which seem related to the same web content displaying. I tested accessing the same mbox with Apple Mail and it worked like a breathe, so it does not seem to come from the provider. Version I use is: Thunderbird 102.3.3, on macOS (11.6.2, also tested on 12.6 without success). Cookies are accepted in Thunderbird parameters. Any help would be very appreciated - please tell me if you need further info to analyze. Benjamin