I have received this message a couple of times in the last month.....never been locked out of my account - is it legit? if you hit the button (review recent activity) it takes you to your log in page. Have never gone further than that.


Microsoft account unusual sign-in activity


MT
Microsoft account team <account-security-noreply@account.microsoft.com>

Reply|
Today, 6:26 AM

Microsoft account
Verify your account
We detected something unusual about a recent sign-in for the Microsoft account d******@outlook.com. For example, you might be signing in from a new location, device, or app.
To help keep you safe, we've blocked access to your inbox, contacts list, and calendar for that sign-in. Please review your recent activity and we'll help you take corrective action. To regain access, you'll need to confirm that the recent activity was yours.
Review recent activity
Thanks,
The Microsoft account team