About installing Bonjour (Windows)
The Bonjour service must be installed for hosts on your local network to be discovered. If Bonjour isn't installed or if the Bonjour service isn't running, users won't be able to view hosted files on your local network in the Hosts dialog box. Without Bonjour, they must manually enter the names or IP addresses for hosts on your local network.
Use Setup.exe in silent or full interface mode to automatically install Bonjour. Using the .msi file does not do an automatic install. See FileMaker Pro Installation Guide.