Convert-DFSn2FQDN

<#
.SYNOPSIS
  Quick and dirty script to aid in converting a domain based DFS Namespace to FQDN as stated here:
  https://support.microsoft.com/en-us/help/244380/how-to-configure-dfs-to-use-fully-qualified-domain-names-in-referrals
 
.EXAMPLE
 Run it from an adminsitrative PowerShell ISE session on each DFS Namespace member.
 
.NOTES
  Please remmeber to do a backup of all META data before using this script, and read the article!
  I take no responsability for anything you do with this script.
  
  Author: Michael Mardahl 
  Twitter: @michael_mardahl
  Blog: msendpointmgr.com
  License: MIT - leave author info
#>

#Requires -RunAsAdministrator

$dfsrootFQDN = "contoso.local" #must be the root of the path you access DFS via.
$dfsnode = $env:COMPUTERNAME


#getting list of target namespaces
$targets = Get-DfsnRoot | Select-Object Path -ExpandProperty Path

#removing namespaces from members server that the script is being run on
foreach ($path in $targets) {

    $pathfix = $path -replace "$dfsrootFQDN","$dfsnode"
    Remove-DfsnRootTarget -TargetPath $pathfix
}

Start-Sleep -Seconds 15

#Enabling FQDN on the member server
Set-DfsnServerConfiguration –ComputerName $dfsnode –UseFqdn $true

Start-Sleep -Seconds 15

#restarting services
Stop-Service dfs; Start-Service dfs

Start-Sleep -Seconds 15

#Re-adding namespaces from active directory
foreach ($path in $targets) {

    $pathfix = $path -replace "koncern.local","$dfsnode"
    Dfsutil target add $pathfix
}


#### TOOLS SECTION for advanced users
<# run individually - DO NOT JUST EXECUTE ALL THIS CODE!


#BACKUP NAMESPACE METADATA TO FILE - test and adjust the array index of $name if needed.

$targets = Get-DfsnRoot | Select-Object Path -ExpandProperty Path
foreach ($path in $targets) {

    $name = $path -split "\\"
    $destination = "c:\$($name[3])-dfsBAK.txt"
    dfsutil.exe root export $path > $destination
}

# manual import (make sure you replaced all netbios values in the export with FQDN values)
dfsutil.exe root import set c:\namespace-dfsBAK.txt \\contoso.local\DFSNamespace

# Cleanup of broken Namespace, if you had an accident and need to rebuild it, then cleanup with this and manually re-create the namespace - then wait for replication - the import from backup with the above command.
Remove-DfsnRootTarget -TargetPath \\namesapceMember.contoso.local\DFSNamespace -Path \\contoso.local\DFSNamespace -Cleanup

#>