I need to know if there is a way to switch my Xbox/Microsoft accounts Email to a different...

Hey there, I believe you would need to switch the emails over the Xbox 360 console using the following steps. I don't think there is a way to do it on the PC or Xbox One yet:

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

Because the OneDrive account is the one linked to your gamertag's email address there is only one way to do this. If your gamertag's email address is not a Hotmail one or you want that OneDrive account linked to it you will need to switch the email address
associated with the gamertag.

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

Also, once you have both email addresses, there is a way to switch them to the correct email. Use this a reference ..

Switch a gamertag to another Microsoft account ->
support.xbox.com/.../switch-gamertag-to-different-microsoft-account

Hi there, if you have two gamertags associated with the same email you will need to sign in as one of the gamertags on the Xbox and switch it to a different Microsoft Account (email) using the steps here:

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

You cannot delete an Xbox Live account (Gamertag), but what you will need to do is move the Gamertag to a different Microsoft Account (email address), to free up the email address you want.

This page here explains all the steps you need:
support.xbox.com/.../switch-gamertag-to-different-microsoft-account