1. Navigate to the Admin / Users page and find displayed in the User table the user account you wish to delete.
2. If you have Administrator privileges to delete user accounts, each user row in the User table includes a "Delete" button.  Exception: the currently logged in user account does not include a "Delete" button; you cannot delete (or Disable) the account of the currently logged in user.
3. Click the Delete button for the targeted user, and accept the confirmation.

How Do I Add a New User?
Managing Users in Navisite Cloud Director