Major SiteMinder IdP unfortunately does not currently support the RequestedAuthnContext element of the SAML AuthnRequests, however OpenAM currently has no out of the box means to disable the inclusion of such elements.
In order to enhance interoperability we should introduce a setting that can prevent the addition of RequestedAuthnContext element.
To work this limitation around it is possible to implement a custom SPAdapter extension that removes the element from the constructed XML object manually.
