Unable to browse to all SQL instances when configuring the Server Setup for the Web Service.
You may also not be able to browse to the SQL instance via the SQL Server Management tool
The 'SQL Browser Service' is stopped on the SQL server that is not listed.
Please start the 'SQL Browser Service' on the SQL server that is not listed.
Also, verify that the service Startup mode is set to Automatic.
The try to browse from the Server Setup tool and connect to the needed SQL instance.