Two thoughts come to mind:
1) A DirectLink account (though in my testing it still took additional steps to make sure there was an active session first, maybe try setting it to never expire the session?):
Share Orion Platform views with non-Orion Web Console users
2) Some form of SSO. If Orion uses some form of pass-through authentication then they'd always be signed in, right?
Log in to the Orion Platform with Windows pass-through security