Recursive Function to Find All Folder Paths in vCenter Server Inventory using PowerCLI

    function build_folder_paths {
        Param($folders)
        foreach($folder in $folders) {                                          # iterate through each folder
            $stack.Push($folder.Name)                                           # push this folder to the stack
            $sub_folders = $folder | Get-Folder -type VM -norecursion           # get the immediate sub-folders of this folder
            $stack_array = $stack.ToArray()                                     # convert the stack to an array
            [array]::Reverse($stack_array)                                      # reverse the array so the top of the stack has the highest index
            $folder_path = $stack_array -join "/"                               # join the array with '/' to build the folder path
            $folder_paths.Add($folder_path)                                     # add the folder path to the arraylist
            Write-Host("Folder Path: " + $folder_path)
            if(!$sub_folders) {                                                 # if there are no sub-folders in this folder
                try {
                    $stack.Pop() | Out-Null                                     # then pop the stack
                } catch {
                    Write-Host("Stack Empty.")
                }
            } else {
                build_folder_paths($sub_folders)                                # else, build paths to sub-folders
            }
        }
        try {
            $stack.Pop() | Out-Null                                             # pop parent folder
        } catch {
            Write-Host("Stack Empty.")
        }
    }
$folder_paths = New-Object -TypeName "System.Collections.ArrayList"         # for storing folder paths$stack = New-Object -TypeName "System.Collections.Stack"                    # for building folder paths$start_folders = Get-Folder VM -type VM | Get-Folder -type VM -norecursion  # get the immediate sub-folders of the root folderbuild_folder_paths($start_folders)                                          # build all folder paths$folder_paths | Out-File ./folder_paths.txt                                 # write all folder paths to file