*** Updated on 11/21/2007 by Wrobinson ***
The solution below is not optimal. Your best bet in this scenario is to use RPC/HTTPS. Please refer to the following Microsoft support article for guicance on how to set it up http://support.microsoft.com/kb/833401.
*** End Update ***
This might not be the answer you’re hoping for, but since there are alot of steps, I might as well just forward you to Microsoft’s guide as their’s is probably the most thorough you’ll find: