123abc PS

Stop-Service -DisplayName "Workstation" -force
net use * /d
Start-Service -Name "LanmanWorkstation"
$dom = $env:userdomain
$workgroupname = "WorkGroup"
$domain = "$dom.local"
$password = "Password1" | ConvertTo-SecureString -asPlainText -Force
$username = "$domain\AddComp"
$credential = New-Object System.Management.Automation.PSCredential($username,$password)

Add-computer -WorkgroupName $workgroupname -Credential $credential

Add-Computer -DomainName $domain -Credential $credential
$Com1 = "---------------------------------------------------------"
$Com2 = "| Attention!                                            |"
$Com3 = "| The server needs to restart to apply the last changes.|"
$Com4 = "| Do NOT restart if the domain is incorrect!            |"
$Com5 = "---------------------------------------------------------"
$Com6 = "                                                         "

clear
Write-Host $Com1
Write-Host $Com2
Write-Host $Com3
Write-Host $Com4
Write-Host $Com5
Write-Host $Com6
Write-Host "Check if domain match:"
Write-Host $Com5
Write-Host "Should be" = $domain
Write-Host "Currently" = (Get-WmiObject Win32_ComputerSystem).domain
Write-Host $Com5

Restart-Computer -confirm