Can't sign in to my Outlook email account.

Hello people, I have one outlook account and two Hotmail accounts and use Thunderbird for all three. Lately (after the last microsoft Update??) every time I launch Thunderbird it throws up a dialogue box for each account stating that "log in has failed" and asking me to enter the password. Despite my putting the password in correctly it is rejected repeatedly but after a few attempts I finally get my emails. I have used Thunderbird regularly for 5 or 6 years now and have never had this trouble before. Is it more of Microsoft's monkey business or is there some fault in Thunderbird? Kindest regards, Colin Ballard, 27 July 2024