Hi,
If you get an email from Microsoft account team and the email address domain is @acc2t9qnrt .microsoft.com, it is safe to trust the message and open it.
If you suspect the safety of this email, Do Not click on any links.
Can I trust email from the Microsoft account team?
You could log on in a secure environment and check for suspicious activity.
https://account.live.com/Activity
Also turn on two-step verification to help make your Microsoft account safe.
How to use two-step verification with your Microsoft account
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