I would like to install clients in another forest and I do not want to download the client installation source files from the management point. How do I go about that? Also, please let me know what ports should be open for client communication between two forests.
How to Install New Clients in a Different Forest
You need to copy client installation source files from the management point server in the client’s forest onto a file server. When the installation starts then using CCM setup properties or source path. In the <installation path> under client folder on the configuration manager the client installation source files are located.
Now you need to open mainly four ports for client communication between two forests. They are: local ports 1024-4999, port 2967, port 2968 and local ports 1024-5000.