You can only sign in to the Xbox Console Companion app with one Microsoft account at a time. However, you can switch between different Microsoft accounts.To switch to a different Microsoft account:

  1. Open the Xbox Console Companion app.
  2. Select Settings.
  3. Select Sign Out.
  4. Select Sign In.
  5. Under Use another account, select the Microsoft account that you want to sign in with.
  6. If prompted, enter the credentials associated with that Microsoft account.