Yesterday our ADFS apps stopped working. Long story short we ended up opening a ticket with MS. After about 4 hours they found by moving the Cert we have on the Web Access Proxy from the Personal store to the trusted Root store on that server it all came back online. I was wondering if anyone else had run into this problem. We hadn’t changed anything and per the setup instructions that are still on the MS site https://technet.microsoft.com/en-us/library/dn383662.aspx it says to have the cert in the personal store.
Anyway I was just throwing it out there to see if anyone else had run into this particular problem and might know what causes it so I can be premptive