I am unable to send emails AR since upgrading to office 365.   I have setup the email tab of company profile to the standard smtp.office365.com, port 587, with SMTP checked SSL not checked, username and password confirmed and entered, use SMTP checked.   

- Sending a test email or sending from AR I get the error "mail delivery failed. Use the email tab on the company profile screen to send a test email and confirm that all settings are correct.     

I am running Sage 2018 Sp1