I tested using Enterprise logins back in January and with the help of our Security IT person. We got everything working using ADFS with AGOL. We turned off this functionality for several months. When I went back to set it up I started getting the following error.
"Unable to login using Idp. Unable to validate SAML response"
As far as we could tell nothing had changed between January and June with our ADFS server. I reimported a fresh version of the XML from ADFS and things started working again.
Have others had this issue where there seems to be no change, but the trust is lost or some other issue? Before we fully implement Enterprise connections I would like to know if this is a common issue. If there is inactivity between AGOL and ADFS does the trust expire?