Getting all domain controllers and their site names in the forest

The function discussed in this section is a simple wrapper on top of the Get-ADDomainController cmdlet to query all the domain controllers in forest and display frequently referred-to details, such as DC name, domain name, site name—whether these names are global catalog servers or not—and reachability of the domain controller:

Function Get-DCDetails {
[CmdletBinding()]
Param(
)
$Domains = (Get-ADForest).Domains
$DCs = $Domains | % { Get-ADDomainController -Filter * -Server $_  }
foreach($DC in $DCs) {
  $OutputObj = New-Object -TypeName PSObject -Property @{
          DCName = $User.Name;
          DCDomain = $null;
          IsGC = $null;
          SiteName = $Null;
          IsOnline = $null
        }
  if(Test-Connection -Computer $DC -Count 1 -quiet) {
    $OutputObj.IsOnline = $true
  } else {
    $OutputObj.IsOnline = $false
  }
    $OutputObj.DCName = $DC.HostName
  $OutputObj.DCDomain = $DC.Domain
  $OutputObj.IsGC...