I believe the URL that Portal is using to reach my rest services is incorrect due to me having to unregister and reinstall a web adaptor because Builder configured it incorrectly somehow. During reinstallation, I entered a more helpful web adaptor name so the services URL Portal is trying to validate is incorrect, therefore I reach this error:
ArcGIS Server services URL 'https://FQDN/server' cannot be validated against 'https://FQDN/server/rest/info'. If the service URL is a proxy URL verify it is accessible to clients.
It could be that this URL is actually correct and I just don't realize it because I originally had named the web adaptor "server," but when I hop on the server machine and try anything with "server" appended to the end, I can't reach my services. I can reach them with the correct web adaptor name with my FQDN or my website domain name. How do I get Portal to recognize the new web adaptor name for Server?
I tried adding a new server site with the correct web adaptor name but it said it was already registered.
I did find this workaround, but I'm hesitant to use it because I don't think that's the problem. https://support.esri.com/en/technical-article/000022369