I just spent 4 hours with some Exch folks trying to figure out why my E12 server kept giving me "501 not implemented" for my RPC/HTTP testing (new blog in progress) before I realized that I'd fergetsted to install the RpcProxy prior to installing Exch. "Read the logs, Luke" - "not implemented" seems kinda obvious in retrospect... <DUH factor="humungo"/> All mail to and from this domain is GFI-scanned.