While the links below may be helpful, please always refer to the individual product's documentation for authoritative information on any topic, including this one. Never assume that documentation on third party sites is as accurate as that provided by the software itself.

Supporting Materials for Identity Providers

• MFA/SFA configuration examples - Shibboleth (as SAML IdP)
• MFA/SFA configuration examples - SimpleSAMLphp (as SAML IdP)
• MFA/SFA with ADFS (as SAML IdP)

Supporting Materials for Service Providers

• How to request authentication contexts as SAML SP/OIDC RP in SAML 2.0 and OIDC protocol flow

There are some useful documents on supporting MFA over on the InCommon wiki.  We hope to develop more advice and guidelines soon.  You might be interested in:

• Shibboleth Multifactor Authentication Configuration.
• InCommon MFA Usage Guidance.