Hi,
I get this error when authenticating a user in Azure AD through ACS and ADFS.
My scenario, ACS as claim provider trust in ADFS.
ACS Identity provider is Office 365 (Azure AD)
My web app connect to ACS provider in ADFS but as per the error message, looks like ADFS can't validate the token received as is missing a certificate, which certificate is this?
What I have done to create the claims provider trust is to import data using with the Office 365 fedaration metadata, as I did in the past for other ACS.
Do you know which certificate could be missing?