In the previous version of SBS, the Configure E-Mail and Internet Connection Wizard (CEICW) could be run again and again and again … and again. If you had an issue with networking, you’d run the wizard as many times as you wanted to reset to the known SBS defaults. With 2008, we provided a wizard for exactly this case, called “Fix My Network” wizard.
The wizard is designed to detect known problems on your network, and then give you the option to fix them or not.
Read more about this here