URGENT: Child's account hacked and Alias changed - Family Safety Evidence

I am writing to report a security breach of my son's Microsoft account.

I am the Organizer of our Microsoft Family group, and I can see the hacker's unauthorized changes live in my Family Safety dashboard.

Account Details:

Parent/Organizer Email: ********@gmail.com

Original Child Email: ***#@gmail.com

Hacker's New Email (Alias): $@outlook.com

The Issue: The account was compromised, and the hacker immediately changed the primary alias and password, making it impossible to use the standard recovery form. However, because this account is a "Child Account" linked to my Family Group, I still have visibility of the account under the hacker's new email address.

I am ready to provide any identity verification or transaction IDs to reclaim this account.

Thank you for your immediate assistance.

Best regards, barak