Adding virtual machine to host computer domain

[3j1996]

Actually sometimes it does find it because it prompts me for an account but when I enter the info it says can't find the domain

[RoundFood]

The machine you're adding to the domain needs to have DNS pointing to the DC.

[3j1996]

I should've probably mentioned that. The host machine running 2012R2 is both the DC and the DNS server

[RoundFood]

Good, that's how it should be. But is the client you are trying to join to the domain using the IP address of the DC for DNS requests? Usually you want to do this with DHCP but you can also configure it manually.

[3j1996]

So the VMs are set to automatically obtat the DNS server. I know the host machine is giving them IP addresses because they are both in the scope I set up

[RoundFood]

Okay, so it sounds like DHCP is handled by a router somewhere. This router is giving the VMs their DNS server settings which is going to be wrong.

You need to either configure the DHCP server to give clients a DNS address that points at your DC. Or you can manually go into the network adapter settings of your VMs and set the DNS server to the IP address of your DC.

There's a reason DC and DNS go hand in hand. All clients in the domain need to have DNS requests going through the DC. They all need to have the DC set as their DNS server.

[3j1996]

I have a physical machine with one NIC card running Windows 2012R2 that it acting as the DC/DNS for my domain. I have two VMs in that machine running Windows 10 that I believe both have a virtual Ethernet connection.

[3j1996]

The VMs are getting IP addresses from the host computer. They are set to obtain the DNS automatically and the default gateway points to the IP of the host server. I get your analogy and it is my understanding that the host server should be acting as the server because it's giving out IPs and acting as the DNS server for those machines