How to change linked account to another

So, I have to change to another xbox/ MS account if I want to link another steam account?
Does changing the xbox account will automatically change the microsoft store account?

You can set up an alias log in for your xbox gamer tag but that is if the gmail account isn't linked to another gamertag at all. Here is a link how to https://support.xbox.com/en-US/my-a...nt/change-email-sign-in-for-microsoft-account

Can i change that on origin account? or can I just change origin account and link it to another?

You cannot transfer data from one account to another. You can change the primary email associated with the accounts though. Which may be helpful depending on what you're trying to do.

The link explaining how to change the primary email address is here

Hello KellyGww!

You have 02 ways to make this change,
01º) You can change the current Gamertag linked to your personal email by another, thus releasing that gamertag to your child.
Here's how to do it here:

https://beta.support.xbox.com/help/account-profile/profile/change-xbox-live-gamertag

Or

02º) You can change the email linked to the Gamertag that you want to "preserve", changing the current email to one that belongs to your child.

Here's how to do it here:

https://beta.support.xbox.com/help/account-profile/manage-account/choose-email

I sincerely hope it will be of help ....