Unusual sign-in activity
We detected something unusual about a recent sign-in to the Microsoft account email@example.com. To help keep you safe, we required an extra security challenge.
IP address: 6.2.02.31
Date: Tue, 20 Sep 2016 05:35:49 -0000
If this was you, then you can safely ignore this email.
If you're not sure this was you, a malicious user might have your password. Please review your recent activity and we'll help you take corrective action.
Please check out attached document for further instructions.