Hi,

In our environment Domain Controllers does not installed DHCP Role so DHCP powershell modules not installed. Get-WinADDHCP gives CommandNotFoundException.

We write another powershell function to do that. So we don't need to install the Features> Remote Server Administration Tools > DHCP Server Tools in order to run testimo. Here is the code, add in the ADEssentials.psm1 file

function Get-DhcpServer{ [cmdletBinding()] param(

The domain controller to use for the search. If not provided, the function will use the Get-ADDomainController cmdlet to find the domain controller in the closest site.

    [Parameter(Mandatory=$false)]
    [string]$DomainController
)
# If the $DomainController parameter is not provided, use the Get-ADDomainController cmdlet to find the domain controller in the closest site.
if (!$DomainController) {
    $DomainController = (Get-ADDomainController -Discover -NextClosestSite).hostname
}

# Construct the search base for the Active Directory Configuration Partition.
$DomainComponents = ($DomainController -split '\.')
$SearchBase = "cn=configuration,dc=$($DomainComponents[1]),dc=$($DomainComponents[2]),dc=$($DomainComponents[3])"

# Search the Active Directory Configuration Partition for DHCP servers.
$GetDHCPServersFromADSI = Get-ADObject -SearchBase $SearchBase -Filter "objectclass -eq 'dhcpclass' -AND Name -ne 'dhcproot'" -Properties dhcpServers

# Create an array of objects that contain the IP address and DNS name of each DHCP server.
$DHCPServers = @()
foreach ($item in $GetDHCPServersFromADSI)
{
    # Create a new object to hold the IP address and DNS name of the DHCP server.
    $DHCPServer = [pscustomobject]@{
        IPAddress = "" 
        DnsName = ""
    }

    # Get the DNS name of the DHCP server.
    $DHCPServer.DnsName = $item.name

    # Get the IP address of the DHCP server.
    $DHCPServer.IPAddress = ($item.dhcpServers -split '\$')[0].substring(1)

    # Add the object to the array.
    $DHCPServers += $DHCPServer
}

# Return the array of objects.
Return $DHCPServers

}

function Get-WinADDHCP { [cmdletBinding()] param(

)
$ForestDomainControllers = Get-WinADForestControllers
try {
    $DHCPs = **Get-DhcpServer** -Verbose
} catch {
    Write-Warning -Message "Get-WinADDHCP - Couldn't get DHCP data from AD: $($_.Exception.Message)"
    return
}
$CacheDHCP = @{}
$CacheAD = [ordered] @{}
foreach ($DHCP in $DHCPs) {
    $CacheDHCP[$DHCP.DNSName] = $DHCP
}
foreach ($DC in $ForestDomainControllers) {
    $CacheAD[$DC.HostName] = $DC
}

foreach ($DHCP in $DHCPs) {
    $DHCPObject = [ordered] @{
        DNSName   = $DHCP.DNSName
        IPAddress = $DHCP.IPAddress
    }
    if ($CacheAD[$DHCP.DNSName]) {
        $DHCPObject['IsDC'] = $true
        $DHCPObject['IsRODC'] = $CacheAD[$DHCP.DNSName].IsReadOnly
        $DHCPObject['IsGlobalCatalog'] = $CacheAD[$DHCP.DNSName].IsGlobalCatalog
        $DHCPObject['DCIPv4'] = $CacheAD[$DHCP.DNSName].IPV4Address
        $DHCPObject['DCIPv6'] = $CacheAD[$DHCP.DNSName].IPV6Address
    } else {
        $DHCPObject['IsDC'] = $false
        $DHCPObject['IsRODC'] = $false
        $DHCPObject['IsGlobalCatalog'] = $false
        $DHCPObject['DCIPv4'] = $null
        $DHCPObject['DCIPv6'] = $null
    }
    $DNS = Resolve-DnsName -Name $DHCP.DNSName -ErrorAction SilentlyContinue
    if ($DNS) {
        $DHCPObject['IsInDNS'] = $true
        $DHCPObject['DNSType'] = $DNS.Type
    } else {
        $DHCPObject['IsInDNS'] = $false
        $DHCPObject['DNSType'] = $null
    }
    [PSCustomObject] $DHCPObject
}

}

EvotecIT / Testimo

Get-WinADDHCP CommandNotFoundException #177

The domain controller to use for the search. If not provided, the function will use the Get-ADDomainController cmdlet to find the domain controller in the closest site.

}