I learned how to:

• Set up a Windows Server virtual machine with a fake IP address and create a domain for it.
• Create a Windows 10 virtual machine, install RSAT tools, and enable access to Active Directory Users and Computers.
• Enable the Admin account on the Windows 10 machine, log in with a local account, then remove and re-add it to the domain.
• Change the network adapters from NAT to Host-only for both machines in VirtualBox settings.
• Rename the Windows 10 machine to "CLIENT2" and join it to the domain.
• Test connectivity between the two virtual machines using the ping command.

Note: I set the default gateway and preferred DNS server of the Windows 10 machine to match the IP address of the Windows Server to enable communication between the two virtual machines.