[tracker1]

It's worth noting that you can mount very simple SOAP services in .Net (doesn't mean that people do)... WCF for example gives a lot of ways to mount your services together, or separately.

That said, I've never really been a fan of SOAP in general, and WS-(death)* is painful in any system. Funny enough, I've found node.js to be the easiest middle-man to coerce into using different services as a gateway, and it's my go-to when a wsdl doesn't import cleanly into a .Net project, and just define my own JSON/REST interface in front of the foreign services for the parts I need.

AD integration is particularly painful, and pretty much only works in IIS, in that case, I'd lean towards writing a shim in ASP.Net MVC exposing JSON endpoints, in a similar fashion.