PowerShell script to sync a specific folder within a SharePoint Document Library - powershell

Question

I am trying to adapt a script that syncs an entire document library.
What I want to achieve is syncing just a specific folder within a document library.
IE: User 1 has no permissions to the site or root folder of the document library, but has contribute permission to \site\documents\Folder1\Folder2
Is there a way to script it to sync just folder 2?
When I use the attached script, I get "We can't sync this folder right now" as User1 does not have access to the site or root of the document library.
#region Functions
function Sync-SharepointLocation {
param (
[guid]$siteId,
[guid]$webId,
[guid]$listId,
[mailaddress]$userEmail,
[string]$webUrl,
[string]$webTitle,
[string]$listTitle,
[string]$syncPath
)
try {
Add-Type -AssemblyName System.Web
#Encode site, web, list, url & email
[string]$siteId = [System.Web.HttpUtility]::UrlEncode($siteId)
[string]$webId = [System.Web.HttpUtility]::UrlEncode($webId)
[string]$listId = [System.Web.HttpUtility]::UrlEncode($listId)
[string]$userEmail = [System.Web.HttpUtility]::UrlEncode($userEmail)
[string]$webUrl = [System.Web.HttpUtility]::UrlEncode($webUrl)
#build the URI
$uri = New-Object System.UriBuilder
$uri.Scheme = "odopen"
$uri.Host = "sync"
$uri.Query = "siteId=$siteId&webId=$webId&listId=$listId&userEmail=$userEmail&webUrl=$webUrl&listTitle=$listTitle&webTitle=$webTitle"
#launch the process from URI
Write-Host $uri.ToString()
start-process -filepath $($uri.ToString())
}
catch {
$errorMsg = $_.Exception.Message
}
if ($errorMsg) {
Write-Warning "Sync failed."
Write-Warning $errorMsg
}
else {
Write-Host "Sync completed."
Exit
while (!(Get-ChildItem -Path $syncPath -ErrorAction SilentlyContinue)) {
Start-Sleep -Seconds 2
}
return $true
}
}
#endregion
#region Main Process
try {
#region Sharepoint Sync
[mailaddress]$userUpn = cmd /c "whoami/upn"
$params = #{
#replace with data captured from your sharepoint site.
siteId = ""
webId = ""
listId = ""
userEmail = $userUpn
webUrl = ""
webTitle = ""
listTitle = ""
}
$params.syncPath = "$(split-path $env:onedrive)\$($userUpn.Host)\$($params.webTitle) - $($Params.listTitle)"
Write-Host "SharePoint params:"
$params | Format-Table
if (!(Test-Path $($params.syncPath))) {
Write-Host "Sharepoint folder not found locally, will now sync.." -ForegroundColor Yellow
$sp = Sync-SharepointLocation #params
if (!($sp)) {
Throw "Sharepoint sync failed."
}
}
else {
Write-Host "Location already syncronized: $($params.syncPath)" -ForegroundColor Yellow
Exit
}
#endregion
}
catch {
$errorMsg = $_.Exception.Message
}
finally {
if ($errorMsg) {
Write-Warning $errorMsg
Throw $errorMsg
}
else {
Write-Host "Completed successfully.."
Exit
}
}
#endregion