# Install Active Directory Service Role
Install-WindowsFeature -Name 'AD-Domain-Services' -IncludeManagementTools | Out-Null
$RoleCheck = (Get-WindowsFeature -Name 'AD-Domain-Services').InstallState
If ($RoleCheck -eq 'Installed') {
Write-Output `r 'Active Directory Role Installed' `r

}

# Define Active Directory Domain
$DefineADDomain = Read-Host -Prompt 'Please Enter the Active Directory Domain Service'
$DefineADDnsDomain = $DefineADDomain.Split('.')[1]

Write-Output `r "Active Directory FQDN: $DefineADDomain"
Write-Output "Active Directory DNS: $DefineADDnsDomain"

# Define Domain Forrest and Mode
$QueryOS = (Get-WmiObject -Class Win32_OperatingSystem).Caption


If ($QueryOS -clike 'Microsoft Windows Server 2008R2*') {
Write-Output 'Operating System: Microsoft Windows Server 2008R2'
$DomainForest = 'Win2008R2'
$DomainMode =  'Win2008R2'
}

If ($QueryOS -clike 'Microsoft Windows Server 2012*') {
Write-Output 'Operating System: Microsoft Windows Server 2012'
$DomainForest = 'Win2012R2'
$DomainMode =  'Win2012R2'
}

If ($QueryOS -clike 'Microsoft Windows Server 2016*') {
Write-Output 'Operating System: Microsoft Windows Server 2016'
$DomainForest = 'WinThreshold'
$DomainMode =  'WinThreshold'
}


If ($QueryOS -clike 'Microsoft Windows Server 2019*') {
Write-Output 'Operating System: Microsoft Windows Server 2019'
$DomainForest = 'WinThreshold'
$DomainMode =  'WinThreshold'
}

Write-Output `r 'Configured Active Directory Domain Forest and Mode:'
$DomainForest
$DomainMode

Write-Output 'Configuring Domain Serivce Recovery Mode Password [DSRM]:'