In case you receive the following e-mail, DO NOT click anywhere in the message and delete it immediately (please notify your administrator).
It’s a fake message and has nothing to do with Microsoft. As you can see, the sender is by no way related to Office 365 services:
From: Office 365 Online [email@example.com]
Received: Δευτέρα, 12 Ιουν 2017, 6:23
Subject: Terms of Service Update
Dear Office365 User,
Your account is not updated and will be shutdown within the next 24hours if you fail to update it.
Click here to update your email account now
Thank you for your patronage.
Microsoft office365 Team
Copyright © 2017
This e-mail may contain information that is privileged and confidential. If you suspect that you were not the intended recipient, please delete it and notify the sender as soon as possible.