Unable to personalize display in Hyper-V VM

I have two physical servers running Windows Server 2025 Standard Edition, each with Hyper-V installed.   On the first 2025 server, I have no issues adjusting video/personalization settings in running virtual machines.  On the second server, I created a 2025 domain controller but I am unable to adjust any of the video settings ("remote resolution changes not allowed") even though enhanced sessions are enabled.  How can I fix this on the second server?  Thanks.