I got it to work… for future reference
The AutoUpdate.exe only supports http, not https
The issue I was running into was that the server config in http://myserver/deployment/client/config/myconfig.sysconfig was pointing to https. So even though my local AutoUpdate.exe was requesting the initial config from http, as soon as that config downloaded it re-read the sysconfig settings and tried to continue from https which throws a not supported error.
a couple of suggestions, since this is deployment most suited for WAN deployment why not support https? You get it for “FREE” if you use the WebClient or any of the standard .NET classes and it would be nice to have it all wrapped in a nice secure tunnel, documentation for this stuff would be AWESOME!
Also it would be great if the Epicor Client Installer supported http, currently it asks fir \SEVER\Deployment and it will not accept HTTP URL as an option. Is there an alternate Client Installer?
Thanks @Bart_Elia