Windows 11 cannot be a Domain Controller (it runs Server OS only for AD DS). Windows 11 can only join a domain or run RSAT (Remote Server Administration Tools) to manage AD remotely. Assuming you meant: "I installed RSAT to manage AD from Windows 11" Phase 1: Immediate Verification 1.1 Confirm RSAT Installation Open PowerShell as Admin and run:

Open ADUC → Right-click domain → Find → Search for a user → Result found.

Add-WindowsCapability -Online -Name "Rsat.ActiveDirectory.DS-LDS.Tools~~~~0.0.1.0" ✅ Use Windows 11 Pro/Enterprise (Home edition cannot join a domain) ✅ Keep DC reachable – VPN if working remotely ✅ Enable BitLocker on the Windows 11 device for domain credential protection ✅ Document your domain admin account – Store password in a password manager