title: I can't delete a native App Registration in Azure AD portal
body: <p>I just want to delete an AD app registration that I create for testing purpose. I can't delete it because the delete button is grayed out. Before I deleted another not used application without any problems!
  Any suggestions?</p>
  
  <p><a href="https://i.stack.imgur.com/6mwUV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6mwUV.png" alt="enter image description here"></a></p>