fix: Update SharePoint authentication and folder browser with proper permissions

SharePointFunctions.ps1

@@ -37,7 +37,6 @@ function Save-Config {
 
 function Connect-SharePoint {
     try {
-        # Use current form values instead of saved config
         $siteUrl = $script:txtSiteUrl.Text
         $clientId = $config.ClientId
         $clientSecret = $config.ClientSecret
@@ -46,11 +45,15 @@ function Connect-SharePoint {
             throw "Please enter a Site URL"
         }
         
-        Connect-PnPOnline -Url $siteUrl -ClientId $clientId -ClientSecret $clientSecret -WarningAction SilentlyContinue
+        Connect-PnPOnline -Url $siteUrl -ClientId $clientId -ClientSecret $clientSecret `
+            -WarningAction SilentlyContinue `
+            -Tenant "sutterhill" `  # Match your tenant name
+            -Scopes @("AllSites.FullControl")  # Required for folder browsing
+        
         return $true
     }
     catch {
-        $script:txtStatus.Text += "Error connecting: $_`n"
+        $script:txtStatus.Text += "Connection Error: $($_.Exception.Message)`n"
         return $false
     }
 }
@@ -131,29 +134,28 @@ function Move-Files {
     }
 }
 function Get-FolderBrowser {
-    param($context)
     try {
         if (-not (Connect-SharePoint)) {
             return $null
         }
         
-        $libraryName = $script:txtProdLib.Text
-        if (-not $libraryName) {
-            throw "Production Library name is required"
+        # Verify library exists and is accessible
+        $library = Get-PnPList -Identity $script:txtProdLib.Text -Includes RootFolder,HasUniqueRoleAssignments
+        if ($library.HasUniqueRoleAssignments) {
+            throw "This library has unique permissions - verify app has access"
         }
         
-        $ctx = Get-PnPConnection
-        $web = Get-PnPWeb
-        $library = Get-PnPList -Identity $libraryName
+        # Get folders with elevated permissions
+        $ctx = Get-PnPContext
+        $ctx.Load($library.RootFolder.Folders)
+        $ctx.ExecuteQuery()
         
-        $folders = Get-PnPFolder -Url $library.RootFolder.ServerRelativeUrl -Includes Folders | 
-            Select-Object -ExpandProperty Folders |
-            Select-Object Name, ServerRelativeUrl
-            
-        return $folders | Out-GridView -Title "Select Folder (Double-click to select)" -PassThru
+        return $library.RootFolder.Folders | 
+            Select-Object Name, ServerRelativeUrl |
+            Out-GridView -Title "Select Folder" -PassThru
     }
     catch {
-        $script:txtStatus.Text += "Error browsing folders: $_`n"
+        $script:txtStatus.Text += "Folder Error: $($_.Exception.Message)`n"
         return $null
     }
 }

config.json

@@ -3,5 +3,6 @@
   "ClientId": "dcb744a3-96ee-4521-bb35-9909146d3a13",
   "SiteUrl": "https://sutterhill.sharepoint.com/sites/tax",
   "ProductionLibrary": "Documents",
-  "ClientSecret": "9NR8Q~GHuB2gtdMXK0N6WbwtOFokXoXa~924Ebso"
+  "ClientSecret": "9NR8Q~GHuB2gtdMXK0N6WbwtOFokXoXa~924Ebso",
+  "TenantId": "sutterhill"
 }