Promote HQ-DC01

Purpose

Create the first Active Directory forest and domain.

Domain values

Item	Value
Forest	corp.gntech.lab
Domain	corp.gntech.lab
NetBIOS	CORP
Functional level	Windows Server default available in Server 2025

Install roles

Install-WindowsFeature AD-Domain-Services,DNS -IncludeManagementTools

Promote server

Install-ADDSForest `
  -DomainName "corp.gntech.lab" `
  -DomainNetbiosName "CORP" `
  -InstallDns `
  -NoRebootOnCompletion:$false

After reboot

Validate:

dcdiag
repadmin /replsummary
Get-ADDomain
Get-ADForest

Snapshot

Take a snapshot after successful promotion:

HQ-DC01-after-domain-promotion