We recently switched over to Office 365, and I am updating email alerts on our 7000 series routers. I was wondering if the sender email address for the emergency call email alerts has to be an authenticated email address that can send and receive email.
The way I did it was to configure an SMTP Relay server on the network that accepts relay from the 7100 and then relays it using an Office 365 account. There are some other options you might be able to use if you don't have a SMTP relay server. See the following article: How to set up a multifunction device or application to send email using Office 365 - Office 365
John W