Query Active Directory without ActiveDirectory Module

System.DirectoryServices.ActiveDirectory.ps1

#get dnsroot
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().Name

#get domain distinguishedname
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().GetDirectoryEntry().Properties["distinguishedName"]

#list domain controllers
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().FindAllDomainControllers().Name

#get PDC
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().pdcroleowner.GetDirectoryEntry().CN
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().PdcRoleOwner.Name
(Get-ADDomain).PDCEmulator

#Get current user's domain id
[System.DirectoryServices.ActiveDirectory.Domain]::GetCurrentDomain().GetDirectoryEntry().name.toupper()

#get dns domain name from network information
[System.Net.NetworkInformation.IPGlobalProperties]::GetIPGlobalProperties()