Hello,
Switching primary MSA requires to switch to local account and then back to new MSA.
Follow these steps:
- Open Start > Settings > Accounts > Your info
- Click the link Sign in with a Local Account instead
- Enter your information
Sign in then do this:
- Open Start > Settings > Accounts > Your info
- Click the link Sign in with a Microsoft Account instead
- Enter your information
Your email address is changed now.
Regards.