Hi Brad have you fixed that email issue? I have a java application which establishes TLS connection to office365 to gets emails through imap port. suddenly on 25 September, it failed. it said "...prod.outlook.com:1993:ssl Authenticate failed". I can get emails through command line - openssl s_client -connect outlook.office365.com:143 -crlf -starttls imap
Like what you thought, I thought it's caused by that java application. but I didn't touch that java application for a long time. so I guess it's an issue from office365. I have raised it to office365. but in case that you got answer, could you tell me? thanks. Best Regards, Danny

