How to Resolve 'This Email Is Part of a Reserved Domain' Issue on Microsoft Account

Are you experiencing issues while trying to add a new or old Microsoft account with a custom domain like msn.com or your own custom domain? If so, you may encounter an error message stating 'This email is part of a reserved domain.' This issue can be frustrating, especially if you're unable to manage all your Microsoft accounts from one mailbox.

To resolve this problem, let's take a look at the possible solutions. First, ensure that your Gmail or Yahoo account is not linked to a Microsoft account. If it is, you'll need to create an alias email address using a different domain name. This can be done by going to the Microsoft account settings and adding an email alias under one of the supported domains.

Another solution involves using your Gmail or Yahoo email account as an alias for your Microsoft account. To do this, go back to the sign-in tab and enter your email account in the format shown above. Click 'Manage your sign-in email or phone number' and select the option to use your Gmail or Yahoo domain name with.

If you're still experiencing issues, there may be another reason causing the problem. For example, if you deleted an account from a computer and would like to add it back as a new user, this could be the cause of the error message. Similarly, if you used a third-party domain email address to create a Microsoft account, this may also trigger the 'This email is part of a reserved domain' issue.

To resolve these issues, you can try adding an email alias under one of the supported domains or using your Gmail or Yahoo email account as an alias for your Microsoft account. If none of these solutions work, there may be another underlying cause that needs to be addressed.

In summary, the 'This email is part of a reserved domain' issue on Microsoft account can be resolved by using an alias email address with a different domain name or adding an email alias under one of the supported domains. By following these steps, you should be able to manage all your Microsoft accounts from one mailbox and avoid encountering this error message in the future.

Msn sign in email account