Ah, not just me having FairEmail failing to authenticate an outlook.com email account today, then.
While Thunderbird is not having this problem today, TbSync in Thunderbird has had most of one day a week for the last month or so when it failed to authenticate with my outlook.com address book and calendars. Has cleared up over night each time, and I've always assumed some Microsoft mess up, not the software. I'm presuming the same will be the case with FairEmail and the mailbox authentication.
While Thunderbird is not having this problem today, TbSync in Thunderbird has had most of one day a week for the last month or so when it failed to authenticate with my outlook.com address book and calendars. Has cleared up over night each time, and I've always assumed some Microsoft mess up, not the software. I'm presuming the same will be the case with FairEmail and the mailbox authentication.