Hi Folks; I'm trying to install IAS on Windows 2000 AdvSrvr. It's an Exchange 2000 machine that also runs DNS and Certificate Services. For some reason installation won't complete - I get this error message; "An error occurred which prevented the Internet Authentication Service component from being installed or removed. The error was 0x80040154." Does anyone know what I have to do to get IAS installed on this machine? It's in otherwise perfect shape. Thanks! Dave
