Documentation for @mapgrady's patch for simplesamlphp/simplesamlphp#498

docs/simplesamlphp-reference-idp-remote.md

@@ -104,6 +104,15 @@ SAML 2.0 options
 
 The following SAML 2.0 options are available:
 
+`disable_scoping`
+:    Whether sending of samlp:Scoping elements in authentication requests should be suppressed. The default value is `FALSE`.
+     When set to `TRUE`, no scoping elements will be sent. This does not comply with the SAML2 specification, but allows 
+     interoperability with ADFS which [does not support Scoping elements](https://docs.microsoft.com/en-za/azure/active-directory/develop/active-directory-single-sign-on-protocol-reference#scoping).
+
+:   Note that this option also exists in the SP configuration. This
+    entry in the IdP-remote metadata overrides the option in the
+    [SP configuration](./saml:sp).
+
 `encryption.blacklisted-algorithms`
 :   Blacklisted encryption algorithms. This is an array containing the algorithm identifiers.