We've just recently completed a corporate migration from on-premise Exchange 2010 to Office 365.
However, before I can completely retire our onsite server I need to understand what the most common method is for allowing smtp enabled devices (i.e. networked multifunction scanner/printers, network monitoring servers, mail enabled UPS, etc.) for sending alerts to uses within our mail domain?
Do I need to create a local SMTP relay (postfix, sendmail, etc.) that authenticates to our Office365 by using a user license account, and then relays the message from onsite to the Office365 servers? Or is there a simpler way of doing this?
Thanks for any feedback you can offer.