The Outlook Mail that you can see on top is just the default identification for the email account. If you can see your account with outlook.com domain, it means that your account has been migrated fully. It will show as the email address when you click your
name on the upper right corner of the Outlook.com page.
To answer your other concern, when your old email address doesn't suit you anymore but you want to save your contacts, online storage, subscriptions, and settings etc. then you can add an alias to your existing Microsoft account. An alias is another email
address that works with the same account. To process this, please follow the steps below:
- Go to https://account.microsoft.com/profile/ and sign in to your account.
- Click on Manage your sign-in email or phone number.
- Select Add email.
- Follow the instructions to set up and verify your new alias or create a new Outlook.com email, or add any address that isn't already a Microsoft account.
If you still have other concerns, feel free to message us again.
Thank you.