My sister has been thrust into an IT position and posed a question to me, but unfortunately I don't know much about this particular subject. After upgrading to Office 365 her users are receiving unsolicited emails from Microsoft to upgrade their apps from 2013 to 2016. She does not want anyone to upgrade due to untested add-ons and such.
The email looks like this:
Is there a way to stop these and only send them to 365 admins or a similar solution so she's not inundated with questions from her users?