I am using version 8.5.5 and that works fine on a Windows 7 that is not in the domain.
The only thing I had to do was add the server name to the hosts file, I have both the server name and the FQDN as in
192.168.1.1 cups cups.mycompany.com
You can define the server by IP address but it seems to move internally to the server name and it needs to be able to map that to an IP address
Graham