ExecuteQuery” with “0” argument(s): “The remote server returned an error: (403) Forbidden–On SharePoint PowerShell CSOM

The above said exception looks very strange. Because, I have installed the SP Online Management Shell and all the DLLs were properly installed. But, when I try to execute the below code, on the ExecuteQuery, I am getting an exception of 403 forbidden.

 $UserName="sathish@*******.onmicrosoft.com"
 
 $Password = ConvertTo-SecureString  "********" -AsPlainText -Force
 
 $URL="https://*******.sharepoint.com/sites/DeveloperSite"
 
 $SiteListName="SiteRequests"
 
 $SPCredentials = New-Object -typename System.Management.Automation.PSCredential -argumentlist $UserName,$Password
 
 Connect-PnPOnline -Url $URL -Credentials $SPCredentials
 
  
      
 
     $SPOCredentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $Password)
     $context = New-Object Microsoft.SharePoint.Client.ClientContext($URL)
     $context.Credentials = $SPOCredentials 
 
     $web = $context.web
 
     $context.load($web)
     $context.ExecuteQuery()
 
      
 
 Disconnect-PnPOnline
 

After few investigations found that, there is a conflict between the DLLs in the loading order. The only thing on the above code is, I am using SPO Online commands (SPO) for few reason and the context.executequery (CSOM) as well. That’s were the issue starts.

Then by loading the Microsoft.SharePoint.Client.dll and the Microsoft.SharePoint.Client.Runtime.dll explicitly, the exception gone. The complete code is as follows.

 $UserName="sathish@*******.onmicrosoft.com"
 
 $Password = ConvertTo-SecureString  "********" -AsPlainText -Force
 
 $URL="https://*******.sharepoint.com/sites/DeveloperSite"
 
 $SiteListName="SiteRequests"
 
 $SPCredentials = New-Object -typename System.Management.Automation.PSCredential -argumentlist $UserName,$Password
 
 Connect-PnPOnline -Url $URL -Credentials $SPCredentials
 
  
      
 Import-Module "C:SATHISH\ArchiveClientDLLs.O365Microsoft.SharePoint.Client.dll"
     Import-Module "C:SATHISH\ArchiveClientDLLs.O365Microsoft.SharePoint.Client.Runtime.dll" 
 
     $SPOCredentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $Password)
     $context = New-Object Microsoft.SharePoint.Client.ClientContext($URL)
     $context.Credentials = $SPOCredentials 
 
     $web = $context.web
 
     $context.load($web)
     $context.ExecuteQuery()
 
      
 
 Disconnect-PnPOnline
 

Hope this will help while implementing both SPO and CSOM on the same PowerShell Script.

Happy Coding,

Sathish Nadarajan.