title: TFS Adding a user which does not belong to our domain
body: <p>We have a auditor who want to access to our TFS to view source codes in our company.</p>
  
  <p>I am wondering if I need to create a user in the active directory to our domain and then assign this active directory user to TFS?</p>
  
  <p>What would be the best way?</p>
  
  <p>Thank you.</p>