Public/Get-ADSIDomainController.ps1

function Get-ADSIDomainController
{
<#
.SYNOPSIS
    Function to retrieve Domain Controllers
 
.DESCRIPTION
    Function to retrieve Domain Controllers
 
.PARAMETER Credential
    Specifies alternative credential
 
.PARAMETER DomainName
    Specifies the Domain Name where the function should look
 
.EXAMPLE
    Get-ADSIDomainController
 
.EXAMPLE
    Get-ADSIDomainController -Credential (Get-Credential)
 
.EXAMPLE
    Get-ADSIDomainController -DomainName "FXTEST.local"
 
.NOTES
    Francois-Xavier Cat
    lazywinadmin.com
    @lazywinadm
    github.com/lazywinadmin/ADSIPS
#>

    
    [CmdletBinding()]
    [OutputType('System.DirectoryServices.ActiveDirectory.DomainController')]
    param
    (
        [Alias("RunAs")]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty,
    
        $DomainName = [System.DirectoryServices.ActiveDirectory.Domain]::Getcurrentdomain()
    )
    
    BEGIN
    {
        
        
        IF ($PSBoundParameters['Credential'])
        {
            $Context = New-ADSIDirectoryContext -Credential $Credential -contextType Domain
            if ($PSBoundParameters['DomainName'])
            {
                $Context = New-ADSIDirectoryContext -Credential $Credential -contextType Domain -DomainName $DomainName
            }
        }
        ELSE
        {
            $Context = New-ADSIDirectoryContext -contextType Domain
            if ($PSBoundParameters['DomainName'])
            {
                $Context = New-ADSIDirectoryContext -contextType Domain -DomainName $DomainName
            }
        }
    }
    PROCESS
    {
        [System.DirectoryServices.ActiveDirectory.DomainController]::FindAll($Context)
    }
}