Two xboxs help

Hello Sam O, I am an independent advisor and I will be happy to help you today. My name is Khaji

I understand that you have two Xbox consoles and want to play Fortnite on both at the same time with separate accounts.

Here are some steps you could follow:

Share your Game Pass subscription: Microsoft allows you to share your Game Pass subscription between two consoles. You can set one of the consoles as your “primary Xbox,” which means the Game Pass subscription will be available to everyone on that console. Any titles you own as part of your game library will also be available to anyone on that secondary console

Use split screen mode: If both players are in the same location, you can use split screen mode in Fortnite. Connect a second controller to the console and select a user account. In Fortnite, hold “X” (PlayStation) or “A” (Xbox) to log into player 2

Using the same Fortnite account on different consoles: Players can use the same Fortnite account on different consoles.

However, you will need to link each of your console accounts to your Epic Games account to enable cross-platform use.

Thank you very much for your patience and understanding! If you need anything else, do not hesitate to contact us again.

every time I log into my account, I get booted off, how does this happen?

Thanks maxen. I for some reason didn't see how to sign in with another account in the Windows Store before I posted this. I have done that and it worked!

Thanks!

Also, it's pretty lame not being able to merge accounts.

There is no way to merge accounts.

What you can do is sign into the Windows Store with your Xbox account and that might work, but it's better to use the Xbox account to also sign into Windows and you can play your games on that profile.

You tried the steps here
support.xbox.com/.../forgot-microsoft-account-solution