Terraform Cloud SSO with ADFS

I’m trying to setup SSO between my TFC Organization and my ADFS instance but not having much luck. My ADFS metadata URL is read correctly, however the Terraform Cloud Entity ID that gets displayed on the following screen does not appear to be resolvable by my ADFS server nor via my personal browser. I’m not an SSO expert but it seems like this entity id url hosted within terraform cloud should be resolvable.

Any thoughts on what I’m doing wrong?