Log into the client machine as Administrator (local admin for that machine).
Have the client machine leave the domain, by going to My Computer-Properties-Computer Name and clicking on Change. Select Workgroup instead of Domain and type a temporary name in there. Take this opportunity to check that the client machine has a sensible name and if not, change it.
There will be a message saying that a reboot is required to complete the operation and asking you whether that should be done now. Choose No.
Delete the entire directory c:\Program Files\Microsoft Windows\Small Business Server\Clients
Go to Run on the Start Menu and type regedit in the box to start the registry editor.
Go to My Computer and disconnect all network drives.
Go to Control Panel-Network Connections and right click on LAN connection to bring up its properties. Select TCP-IP and click on properties. Make sure everything is set to automatic.
Reboot the client machine.
On the Small Business Server, create a New Computer account (if it already exists delete and recreate it) with a matching name.
Back on the client machine, open Internet Explorer and go to //SERVERNAME/connectcomputer (replacing SERVERNAME with the name of your server). This will start the Small Business Server Network Configuration Wizard which adds the client machine to the domain and manages the setup for the user accounts.
You will see a list of all the users registered on the domain and have the option to add them to the client machine. Choose the users that are required.
In the case of any user who has previously been using the client machine, choose to inherit the previous user settings. This avoids having to reinstall progams, remap disk drives and printers and reconfigure the desktop and start menu.
There will be a confirmation screen. Click on Finish and leave the client computer to reboot itself twice (do not interrupt this process as it can cause setup to fail).
