I have remote users who cannot access a new SQL instance that is running in a three node Windows 2003 server cluster. I and other users can access the SQL instance newname.domainname.ad\instancename. The external users successfully access the current DB server via an external IP address which is not running a SQL instance. However, the users unsuccessfully access the new SQL DB using a fully qualified server name with and without the instance name. Also, the users unsuccessfully access the new SQL DB using the external IP address with and without the instance name.

Additionally, I want the network routers to redirect the existing oldname.domainname.ad to redirected to newname.domainname.ad\instancename. Otherwise I will have to go to 600 workstations and update the ODBC connections.