title: How to unlock a field of an entity in CRM Dynamics 4.0
body: <p>I have an email entity, which contains a subject field which is locked. It's already unlocked in the property option. But still it's showing locked.</p>
  
  <p>Welcome for any comment and suggestion.</p>
  
  <p><img src="https://i.stack.imgur.com/cGCXc.png" alt="enter image description here"></p>
  
  <p>on selection of a 'subject' attribute, I clicked on 'Change Property' and I found it;s already unlocked. Please help how to unlock this. see below
  <img src="https://i.stack.imgur.com/EnBQX.png" alt="enter image description here"></p>