A protocol is a method of exchanging the communication between the email accounts. An SMTP is a protocol to send the emails from one server to another. The process to set up the #office365smtpserver settings includes download, install, and activation process via the office setup.
https://oofficecom.uk/office-365-smtp-settings/

How to setup office 365 SMTP settings on your email account?
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How to setup office 365 SMTP settings on your email account?

Learn the basic steps for Office 365 SMTP settings on your email account. Follow the instructions for Office 365 SMTP settings without errors.