We are accessing default port number using ServerManager class from IIS in customer machines. But the Console didn’t run some of the machines and show Microsoft.Web.Administ
No, it is not redistrbutable, it should be installed in the machine with IIS. Even if you did, the likelihood is it will not work since it has dependencies on other libraries (native code DLLs) that need to exist and be registered.
I know this is an older post, but I believe that it is now redistributable as it appears as an assembly under extensions if you try to add a reference to it.