I've set up an ADFS server and I'm in the process of adding a WAP server as ADFS Proxy. When I try to configure the WAP server I get the following error message:
An error occurred when attempting to establish a trust relationship with the federation service. Error: Invalid Request
Both with the wizard and with PowerShell. DNS for the ADFS fqdn resolves to the internal ADFS server and port 443 has been opened in the firewall. An AD user account was used which is local administrator on the ADFS server. I can navigate to https://login.<domain>.com/adfs/ls/idpinitiatedsignon from the WAP server and successfully authenticate. No certificate errors.
I did see other people with similar issues, however their error messages were not 'Invalid Request' like I see.
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