$samAccountName = "a.azubi"
$global:groupList = New-Object System.Collections.ArrayList


function Get-GroupNameFromDn
{
	[cmdletbinding()]
	param([string]$Dn)

	$a = $Dn.split(",")
	$b = $a[0]
	$name = $b.substring(3)
	
	return $name
}

function Get-ADNestedGroupMembersOf 
{
	[cmdletbinding()]
	param (
		[String] $GroupName,
		[Int] $Depth
	)

	$dn = (Get-ADGroup $GroupName).DistinguishedName
	$MemberOfs = Get-ADGroup -LDAPFilter ("(member:1.2.840.113556.1.4.1941:={0})" -f $dn) -ResultPageSize 1000 | select -expand DistinguishedName | sort DistinguishedName
	foreach($parent in $MemberOfs) 
	{
		if($parent -notin $global:groupList)
		{
			$global:groupList.Add($parent) | Out-Null
			Get-GroupNameFromDn $parent
		}
		if($Depth -le 4) 
		{
			Get-ADNestedGroupMembersOf -GroupName $parent -Depth ($Depth + 1)
		}
	}
}

$username = $samAccountName
$dn = (Get-ADUser $username).DistinguishedName
$groups = Get-ADGroup -LDAPFilter ("(member:1.2.840.113556.1.4.1941:={0})" -f $dn) | select -expand DistinguishedName | sort DistinguishedName

foreach($group in $groups)
{
	if($null -ne $group -and $group -notin $global:groupList)
	{
		$global:groupList.Add($group) | Out-Null
		Get-GroupNameFromDn $group
		Get-ADNestedGroupMembersOf -GroupName $group -Depth 1
	}
}

$groups = Get-ADPrincipalGroupMembership $samAccountName | select -expand DistinguishedName | sort DistinguishedName
foreach($group in $groups)
{
	if($null -ne $group -and $group -notin $global:groupList)
	{
		$global:groupList.Add($group) | Out-Null
		Get-GroupNameFromDn $group
		Get-ADNestedGroupMembersOf -GroupName $group -Depth 1
	}
}