SAML on VBR13 dns name

[jasonede]

One of our VBR servers is just configured with its name as <hostname> without any domain or other DNS.
I've managed to get it working with SAML auth with the links to https://<hostname>/oauth/Saml2 and the ACS one, but I've had to add an entry to my local hosts file for the <hostname> pointing to that IP.

Is there any way of changing the IDP links back to the server so I can use our internal DNS to propagate the hostnames back? I realise that it will probably require a new certificate.

I've tried chaging the reply addresses in Entra, but it fails as there's a mismatch.

[MaartenA]

Change the hostname to the fqdn. See also https://www.veeam.com/kb4781

[jasonede]

That appears to imply it'll have no impact on the VBR server itself? There's no way of telling it to use a different URL?