Thunderbird 128.3.3esr 1) Hotmail required authentication to be changed to OAuth2. Despite doing this I still get Authentication failures in the same Thunderbird session although closing and reopening the Account Settings shows authentication as OAuth2. 2) Once Thunderbird is closed and re-opened the Account Settings shows authentication has reverted to normal password. 3) I've tried deleting the account. It reappears on next load of Thunderbird even when I've also deleted pop-mail.outlook.com from the profile (There is only one and it is the default). The pop-mail.outlook.com entry also reappears. I'm considering deleting Thunderbird and attempting to reinstall (I know enough to be able to preserve what mail I want) but if that fails to solve the problem I suppose I'll have to give up on Thunderbird and find another mail client. I've used Thunderbird for many years and occasionally contributed to Mozilla's requests for a contribution but until this is resolved I shall continue to ignore Mozilla's persistent and annoying request for a contribution. After all - even if I were to contribute could I be sure that request wouldn't continue?