I have Windows 10 and Tbird 91.4.1 (64-bit) with succesful connections to IMAP and Gmail accounts. I am trying to add an O365 email account. Everything seems to work until the final DONE button when I get a yellow banner warning saying: "Your cookie settings will cause login errors. Please enable cookies and turn off all restrictions in Thunderbird settings." I haven't been able to find any info in the forum about this issue. Where are the cookie settings? How do I turn off all restrictions in TB? Am I asking the right questions? Can someone point me in the right direction? Regards Alan