We have ADFS on-prem with a relying party trust to our on-prem web app (in our company A).
We grant access to the on-prem app to company B, by adding a claims provider trust to company B (they use ADFS) and passing / transforming claims into the RP - works great.
We wish to use our AzureAD now to do this (company A) and Company B also have Azure AD they wish to use.
My question is, how do we create a claims provider trust in Company A AAD to Company B AAD to achieve the same / test this out?
We tried to add company B's AAD SAML info using external identity providers > new SAML IDP but it errorr'd saying company B is running AAD....
Is there another way we need to do the claim provider trust we are missing?