The below article takes you with the steps to migrate any existing user on prime our all new order management tool.

1) Moving to Prime

Login on satellite using your existing credentials, once you get a popup on the screen click on the option Setup my prime user which will redirect you to Prime.

Alternatively you can click on this link 

2) User Registration

Once you are on Satellite Prime from Step1, log in using your existing satellite credentials.

Verify your user credentials and click on Create Prime User to proceed forward.