DNS Resolving on Client Computers but failing on DC

Question

My Domain Controller is failing to resolve any DNS records:
]2

However all the client Machines that are connected to the DC can resolve all the DNS records with no issues:

I am running a Virtual Switch, VPN and a few other things on the system if this may be any help to solving the issue.
This is really messing up a lot of things as I can't use any RPC features which prevents me from updating policies across the entire network.

My DNS setup doesn't seem to be incorrect.

Hopefully someone may have an answer to this issue, if I find a solution to the issue I will post it here.

Answer 1

The simplest solution may be to remove the VPN and routing from the domain controller.

--please don't forget to Accept as answer if the reply is helpful--

Answer 2

Not really, as I already mentioned multi-homing a domain controller will cause unexpected / unreliable results as you have already experienced. Standing up virtual machines using hyper-v manager is fairly simple and straight forward.
https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/get-started/get-started-with-hyper-v-on-windows

Answer 3

Sounds good, yes stick to using the GUI configuration for now.

Answer 4

Some general info

• Each host needs to be licensed.
• A minimum of 8 core licenses is required for each physical processor and a minimum of 16 core licenses is required for each server.
• Core licenses are sold in packs of two.
• Standard Edition provides rights for up to 2 Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed. For each additional 1 or 2 VMs, all the physical cores in the server must be licensed again.
• DataCenter Edition provides rights for unlimited Operating System Environments or Windows Servers containers with Hyper-V isolation when all physical cores in the server are licensed.

https://download.microsoft.com/download/7/C/E/7CED6910-C7B2-4196-8C55-208EE0B427E2/Windows_Server_2019_licensing_datasheet_EN_US.pdf

Answer 5

For standard edition yes that's correct.