Shibboleth2 with ADFS

[Fong, Trevor]

Hi Everyone,

We're running Shibboleth2 IdP 2.2.0 and are trying to integrate with MS ADFS 2.0 as an SP.
ADFS is reporting the following error:

Request type: http://schemas.xmlsoap.org/ws/2005/02/trust/RST/Issue
Additional Data
Exception details: 
Microsoft.IdentityServer.Service.SamlProtocol.SamlProtocolException:
MSIS1022: Cannot process SAML Response from ''.
Inner exception: ID4037: The key needed to verify the signature could  not be resolved from the following security key identifier 'SecurityKeyIdentifier
    (
    IsReadOnly = False,
    Count = 1,
    Clause[0] =
Microsoft.IdentityServer.Tokens.MSISSecurityKeyIdentifierClause
    )
'. Ensure that the SecurityTokenResolver is populated with the required key.
   at
Microsoft.IdentityServer.Service.Tokens.SamlMessageSecurityTokenHandler.Rea
dToken(XmlReader reader)
   at
System.IdentityModel.Tokens.SecurityTokenHandlerCollection.ReadToken(XmlRea
der reader)
   at
System.IdentityModel.Tokens.SecurityTokenElement.ReadSecurityToken(XmlEleme
nt securityTokenXml, SecurityTokenHandlerCollection securityTokenHandlers)
   at
Microsoft.IdentityServer.Service.SecurityTokenService.MSISSecurityTokenServ
ice.GetOnBehalfOfPrincipal(RequestSecurityToken request, ClaimsPrincipal
callerPrincipal)
   at
Microsoft.IdentityServer.Service.SecurityTokenService.MSISSecurityTokenServ
ice.BeginGetScope(ClaimsPrincipal principal, RequestSecurityToken request, AsyncCallback callback, Object state)
   at System.IdentityModel.SecurityTokenService.BeginIssue(ClaimsPrincipal
principal, RequestSecurityToken request, AsyncCallback callback, Object
state)
   at
System.ServiceModel.Security.WSTrustServiceContract.DispatchRequestAsyncRes
ult..ctor(DispatchContext dispatchContext, AsyncCallback asyncCallback, Object asyncState)
   at
System.ServiceModel.Security.WSTrustServiceContract.BeginDispatchRequest(Di
spatchContext dispatchContext, AsyncCallback asyncCallback, Object
asyncState)
   at
System.ServiceModel.Security.WSTrustServiceContract.BeginProcessCore(Messag
e requestMessage, WSTrustRequestSerializer requestSerializer, WSTrustResponseSerializer responseSerializer, String requestAction, String responseAction, String trustNamespace, AsyncCallback callback, Object
state)

Would anyone know what the issue is?

Thanks,
Trevor Fong