...

Our current position is that while error handling is an important topic, this detail should be captured in a supplemental implementation guide or FAQ. For example, the following are some general scenarios:

...

...

SP requests REFEDS MFA, IdP understands it but is unable to perform MFA, responds with SAML Authn Assertion with something other than REFEDS MFA value (what happens?)

Earlier Working Material

The following links point to earlier discovery materials the Group compiled to organise/prioritise the Profile revision work.

Recording and Slides from the October 6 2022 REFEDS Community Chat

...