It's a bit unclear what you mean by systems here: whether you are trying to join your VM to the Azure AD DS domain or some local machine (server or workstation). If the screenshot is from the VM, you are using the correct tool and could check for the Connectivity issues section from Troubleshoot joining a domain, since the error seems to be related to a connectivity issue.
If the virtual machine is unable to find the domain, try one or more
of the following:
Ensure that the virtual machine is connected to the same virtual
network as the one that you've enabled Azure AD DS in. If it is not
connected, the virtual machine is unable to connect to the domain and
therefore is unable to join the domain.
Ensure that the virtual machine is on a virtual network that is in
turn connected to the virtual network in which you've enabled Azure AD
Try to ping the domain by using the domain name of the managed domain
(for example, ping contoso100.com). If you're unable to do so, try to
ping the IP addresses for the domain that's displayed on the page
where you enabled Azure AD DS (for example, ping 10.0.0.4). If you're
able to ping the IP address but not the domain, DNS might be
incorrectly configured. Check to see whether the IP addresses of the
domain are configured as DNS servers for the virtual network.
Try flushing the DNS resolver cache on the virtual machine (ipconfig
If this is a on-premises system, you don't use AAD DS for joining to the domain. You would either need to have some L2 connection to the cloud network or authenticate using AAD credentials instead of AAD DS (the Join Azure AD wizard on Windows 10).