To disable the Autodiscover:
Open the Desktop Authority Console and navigate to: Client Configuration | Profiles | User | Registry and create a new element using the values shown in the image below if you are using Office 2013:
Action: Write Value
NOTE: x.0 in the above registry path corresponds to the Outlook version (15.0 = Outlook 2013, 14.0 = Outlook 2010, 12.0 = Outlook 2007)
NOTE: Technical Support does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.