Setting up Outlook email account

Trying to set up My outlook email account in Thunderbird. Enter the correct info (User and password) and get incorrect password when I am 1000% sure I am entering the correct password but because there is no way to make any manual changes because Mozilla thinks they have everything set correctly, when they don't, I can't add the account. The manual evidently only works if the password is correct?? I can set the account up obviously in Outlook both on PC and both Outlook and Mail app on the IPhone using the same password but not Thunderbird??