How to Secure a Gamertag:

Login and Access Security Settings
Log in to your account using your credentials. Navigate to the "Security" section of your account dashboard and select "Security Dashboard."

Enhance Security Settings
In the Security Dashboard, go to "Advanced Security Options."
Change your password to a strong one.
Turn off "Receive Alerts" and add verification methods under "Email a Code."

Enable 2FA
Under "Additional Security," enable two-factor authentication (2FA).
Follow the instructions to set up 2FA and generate a "Recovery Code" for safekeeping.

Update Login Alias and Sign Out Devices
Update your login alias by creating a new email or using an existing one.
After updating, log out of all devices via the "Sign Me Out" option in the "Advanced Security" tab.

Review Connected Devices
Check your connected devices and remove any unfamiliar ones.
Ensure your billing information is secure by removing any unfamiliar payment methods.

Monitor Account Activities
Regularly check for suspicious login attempts or unfamiliar device activity.
Additional Tips

Set your Xbox profile picture to default and send a message to verify that your Gamertag isn't duplicated.

✈️ @Guide