Powershell script to get a list of DFS folder targets for all DFS folders under a defined path and test if those paths are valid from the location running the script.

Compare-DFStoFolders.ps1

$Servers = @("SERVER01","SERVER02","SERVER03")

$FolderPaths = $Servers | foreach {
    Get-ChildItem "\\$_\DFSShare$"
} | Sort Path

$FolderPaths | Export-Csv "FolderPaths-$(Get-Date -format yyyy-MM-dd).csv" -NoTypeInformation

$TestPaths = (($FolderPaths).FullName | Sort-Object).Trimend('\')
$DFSPaths = ((Import-CSV "DFS-$(Get-Date -format yyyy-MM-dd).csv").TargetPath | Where-Object {($_ -ilike "*SERVER*") | Sort-Object).Trimend('\')

$TestPaths | Where-Object {$DFSPaths -notcontains $_}

Get-DFSFolderTargets.ps1

[CmdletBinding()] 
param(
    $DFSPath #Example:= '\\example.com\folder\*\whatever'
)

Write-Progress "Getting all DFS folders for $DFSPath (this can take a very long time)" -PercentComplete -1
$DFSTree = Get-DfsnFolder $DFSPath

$i = 1
$DFSTree | ForEach-Object{
    Write-Progress "Getting DFS Folder Targets for $($_.Path)" -PercentComplete (($i / $DFSTree.Count) *100)
    
    $DFSTarget = Get-DfsnFolderTarget $_.Path | Select Path,TargetPath,State

    $Result = [ordered]@{
        Path = $DFSTarget.Path
        TargetPath = $DFSTarget.TargetPath
        State = $DFSTarget.State
        "ValidFrom_$Env:ComputerName" = Test-Path $DFSTarget.Path
    }
    
    New-Object PSObject -Property $Result
    $i++

} | Sort Path | Export-Csv "DFS-$(Get-Date -format yyyy-MM-dd).csv" -NoTypeInformation

Perhaps you don't have access to the DFS namespace.
You can verify by simply running "Get-DfsnRoot -domain [domain.com]"

@JoeAlvis81
For some reason i get empty cells as output shown below:

#TYPE Selected.System.Management.Automation.PSCustomObject
Path	TargetPath	State
		Online
		Online
		Online
		Online
		Online
		Online
		Online
		Online
		Online

This one worked
$namespaces = '\domainns\x*'
foreach ($ns in $namespaces)
{
$DFSNFolders = Get-DfsnFolder -path $ns
foreach($DFSNFolder in $DFSNFolders )
{
$dfs=$DFSNFolder.Path
$DFSTarget = Get-DfsnFolderTarget $DFS | Select Path,TargetPath,State
$DFSTarget|Export-Csv "DFS.csv" -NoTypeInformation -Append
}
}

I get one or more parameter values passed to the method were invalid in the line $DFSNFolders = Get-DfsnFolder -path $ns

Alanmckeon - To fix the error add a \ in the path

$DFSPath = "$($ns.path)*"

Wrote an improved function

https://gist.github.com/laymanstake/4a16bdda8c7ad94c5bdfe734892dcf4e