Send e-mails with Office365
To send e-mails with Office365, you have to use this configuration:
SMTP server: smtp.office365.com
Connection: Auto SSL
[x] Perform SMTP Authentication
your email / App-Password
POP3 is not required
In WebSite-Watcher, you have to enter an App Password, not your Office account password if you're using multi factor authentication. You can create app passwords in your Office account (please use a search engine and search for office365 app password to get more details).