Transfering Xbox Profile to Another Account

Hi there
WizardAssassino,

Thanks for the reply. As our Ambassador has recommended, if you'd like to change the primary alias on your Microsoft account, then you may; however, I would recommend that you do not delete/remove the current alias totally. You may wish to instead
make it a secondary alias on the account, or your mom will lose the account totally.

How to change the email address associated with your Microsoft account

Note:If you choose to remove an alias that uses a Microsoft domain such as @hotmail.com, @outlook.com, or @live.com, that
alias will be completely deleted and will not be available to sign in to any Microsoft services.

Since there is no further resolution and in an effort to minimize repetitive answers we will be locking this thread, but if you have any further questions or concerns feel free to come back to the Xbox forums.

Thanks again & happy gaming!

Yes you can change your email attach to your xbox live account:

How to change the email address or phone number you use to sign in to your Microsoft account online

Step 1: Add a new email address or phone number

1. Sign in to your Microsoft account.
2. Select Your info at the top of the page.
3. Select Manage how you sign in to Microsoft.
4. You may be prompted to re-enter your password or enter a code we send to the email address or phone number listed in your account as security information. This lets us know the request is coming from you.
5. Select either Add email or Add phone number.
   
   Note If you see the message “For security reasons, you need to verify your primary alias before you can add another alias” at the bottom of the page, you will need to either Verify your
   current primary alias or select Rename. If you select Rename, please go to the “How
   to rename an unverified primary alias” section
   
6. If you selected Add email, follow these steps. Otherwise, go to step 7 to add a phone number.
   1. If you want to create a new email address to use, select Create a new email address and add it as an alias, and then follow the instructions.
   2. If you have a non-Microsoft email address (such as an @gmail.com or @yahoo.com email address) that you want to use, select Add an existing email address as a Microsoft
      account alias, and then click Add alias.
      • When you add an existing email address, you'll be required to verify that you own that account. To the right of the alias you added, click Verify, and we'll send a message to that email address to get confirmation.
      • When you receive the verification email, click the link provided to verify that you own the account.
      • Note The email address that you enter can't already be in use as a Microsoft account alias.
7. If you selected Add phone number, follow these steps:
   1. Select your country from the list.
   2. Enter the phone number you want to use, and then select Next.
   3. When you add a new phone number, we'll send a text message to that number to verify it. Enter the code in the text message, and then select Next.

Step 2: Set the new email address as your primary alias

After you add the new email address, you need to set it as your primary alias to have it displayed when you sign in to all devices and services. Here's how:

On the Manage your account aliases page, select Make primary under the email address you want as primary under Account alias.

Note Only email addresses can be used as primary aliases.

Step 3: Remove the email address you no longer want to use to sign in

Note If you choose to remove an alias that uses a Microsoft domain such as @hotmail.com, @outlook.com, or @live.com, that alias will be completely deleted and will not be available to sign in to any Microsoft services.

To remove the email address you no longer use to sign in to your account, select Remove next to that alias on the Manage your account aliases page, and then follow the
instructions provided.

Important Do not remove this email address if you still want to use it to send and receive email messages.

I'm afraid not. It's not possible to transfer an Xbox profile from one Microsoft account to another.

Actually you can genious pay attention to the last line:

Can I transfer content from one Xbox LIVE account to another?

No. Content licenses are stored in the Xbox 360 console rather than in the Xbox LIVE account.

To enable someone else's Xbox LIVE account to use your content licenses, you must download your Xbox LIVE profile and then transfer your content licenses to that person's Xbox 360 console.

•To download your Xbox LIVE profile to a different Xbox 360 console, see Download, move, or delete your Xbox LIVE profile.

•To transfer a content license from one Xbox 360 console to another, see Can I transfer a content license from one Xbox 360 console to another?

After you've downloaded your Xbox LIVE profile and transferred your content licenses to another Xbox 360 console, the content can be used by all the profiles on that console.

Sadly, it is impossible to transfer your Xbox One profile and games from one Microsoft account to another.