Does PingFederate and ADFS support SAML ECP (enhanced client and proxy) profile? If so, is there any documentation?
Yes, PF supports ECP as I believe it is necessary for SAML 2.0 compliance testing. I would like to contact them directly for more information as they have very little documentation.
Don't know what Ping is, but for ADFS, no, it doesn't support ECP.