Before you go through the Office 365 OAuth process, we need to setup the email template you would like tokened and inserted into your employees' mailboxes.
Go ahead and choose Office 365 Mail Bug when deciding on Canarytoken type.
Once you have clicked, Let's begin, you can now set up your custom email template.
The text editor enables you to format the email content as you see fit. The user's email address can be added by placing the $user placeholder where relevant (this placeholder is not required). You may also customise the email's subject.
The hyperlink here shows you where the web bug link will be placed. Be sure to add a message that would entice an attacker to click the link.
When ready, hit Save Template, and your custom O365 token mail will be saved, and you will start the Office 365 OAuth process.