Windows Server 2008 SBS: Change IP address

Default IP Address

When installing Microsoft Small Business Server 2008 the primary server's IP address will default to the first free IP address after the router. If your router is 192.168.0.1 your primary server will be 192.168.0.2

To Change the Static IP address of the 2008 SBS server

Change the IP address in the Local Connection Properties page.
To propagate changes to the DHCP & DNS servers run the Fix my network wizard on the Windows SBS Console, Network Tab, Connectivity Tab & select Fix my network in right pane.

Change any other static addresses

Remember to change the the DNS settings on any machine with static IP addresses.
You may want to run ipconfig /flushdns to clear an cached settings.