title: Active Directory: Allow users of different domain to login
body: <p>We currently have all of our servers in domain A. </p>
  
  <p>But many users from a different department also need to log in on our systems, however, their devices are registered in domain B.</p>
  
  <p>What kind of trust should I set up to allow the users of domain B to log in on our server in domain A. </p>
  
  <p>I assume a one way trust is sufficient to be able to add domain B users to our domain A user groups in the Active Directory? But what direction should it be?</p>
  
  <p>Does that mean that I will be adding the users like domainB\user1 to domainA\group1. Or do I have to redefine domainB\user1 in domain A as domainA\user1 (with the same username and password) and then add domainA\user1 to domainA\group1?</p>