How can I switch the email associated to my Xbox account with an existing email

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today Caleb_H

Unfortunately that’s not possible, is not possible to add an existing Microsoft email address associated with a Microsoft account
You can double check this here:

https://support.microsoft.com/office/add-or-rem...

“You can't add an email address that's associated with a work or school account as an alias.

Existing Hotmail, Live, Outlook.com, and MSN addresses can't be added as aliases, and you can't add an alias that is already associated with another Microsoft account.

It isn't possible to create a new alias using @hotmail, @live.com, or @msn.com. If a Hotmail address is important to you, you need to sign out and create a new account.”

529Black- Switching to an email that no longer exists is not a viable option.

Onyx62- No, the console message only told me what I had won and to check the email associated with my account.

Sorry to hear it. If the email address does not exist and you forgot the password you may be out of luck. The best I can offer is to try changing the email associated with the account.

support.xbox.com/.../switch-gamertag-to-different-microsoft-account

so I can use any email address associated with my microsoft account cause I did switch my other email address associated with my microsoft account to a new email address so its the primary?

Hey, do you know if you have associated both of those gamertags with the one email? If so you might want to switch the email associated to whatever account you can still sign into the xbox with.

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Step on how to change emails here:
support.xbox.com/.../switch-gamertag-to-different-microsoft-account