title: How is the "Grant permissions" button in legacy Azure AD app registration different from "Grant admin consent" in the new experience?
body: <p>The "Grant admin consent" button in the current Azure AD app registration experience (under Azure portal > Azure AD > App registrations > (app) > API permissions) is sometimes greyed out. In the legacy experience, I could always click the button.</p>
  
  <p>What's the difference between the two?</p>