Has someone configured FAS less? can't get it working according to the documentationdocs.citrix.com/us/en/…/entra-sso.html#…

Works for me without any issues. Registered the new apps, configured rdp property, added them to CA exclusion, changed vdi user assignment from AD to Entra. It did broke when I upgraded vda to 2603 from 2511 due to fpromptforpassword reg value. Citrix have subsequently updated their kb with those details https://docs.citrix.com/us/en/citrix-daas/install-configure/session-authentication/entra-sso.html#when-single-sign-on-fails

Which step are you failing at? Works fine for me too