Can't login to Microsoft account on Switch to play on Local Network

I've also tried on my girlfriends switch and I have the same problem.

Unfortunately this is not possible and since your email is a Microsoft email (Live, Hotmail or Outlook) you can't switch the email to another one and have the account not be connected to that email anymore, technically.

You can switch the login emails around but you CAN'T switch TO a Microsoft email when you do this (Live, Hotmail or Outlook). You can switch to another email provider but you can't switch between Microsoft emails as they're permanently connected to that
account they were created on. For example, you can't switch this account's email login to another Microsoft account because that email is attached to a Microsoft account already.

The only solution is to start over and have him create a new account and have the account that owns all the games to be set as the my home xbox account on the xbox one so that the new account can play all the games that account owns BUT the saves and any
progress will not move over and some DLC will not share, also.

https://support.xbox.com/en-US/games/game-setup/my-home-xbox

Fixed it with this:

Hold down Windows + X + A , enter the following two lines of instructions to create a new administrator local account:

Net user User 123 / add

Net localgroup administrators User / add

( User is a new account, 123 is a new password)

Re-switch to Microsoft account login

Hello,

Try creating a new admin user and login to it.

Create a local user or administrator account in Windows - Microsoft Support

Try to test the download. Then switch back with your original profile and see if it still behaves the same way.

I have to full error msg now, I'm able to login to Microsoft on any other device but not PS4 for some reason,

"Oops! Looks like the Microsoft account you are trying to use is already connected to another account on the "PlayStation Network"

Please sign in with a Microsoft account that is not already linked on

"PlayStation Network""

Is the error msg, I can't login with another because this is my only Microsoft account and idk how to logout with this one on playstation without knowing where it is logged into.