Unable to decode incoming request

[Cantor, Scott]

> I'm working with an SP that has provided their metadata to me.  I've made the
> necessary configuration changes to our IdP.  However, when I navigate to their
> test URL, I'm returned back to our IdP with a "Something went wrong" error
> page. The log entries state that its unable to decode the incoming request
> (they're using RSA +SHA1 for signing) which is immediately followed by a
> opensaml error:

They're pointing at an incorrect endpoint at the IdP, not the SAML 2 SSO endpoint.

-- Scott