How can I update the Editor/Author field of a versioned item

Question

I am using a multiline text field with Append Changes to Existing Text enabled. So everytime I add a new comment it creates a new version with, Created by set to the user who triggered the action.

I want to overwrite Created by a different name using server side code in C#. I tried updating Author and Editor field but that did not help.

I couldn't find a solution on the internet as well.

Answer 1

I'm almost positive that Author and Editor are read-only. They can't be updated programmatically.

Answer 2

use this script:

Add-PSSnapin Microsoft.SharePoint.PowerShell -EA 0 
#specify new user - login name 
$newuser = "Support\paulmather" 
#specify the web URL 
$site = get-SPWeb http://vm353/pwa/ProjectBICenter 
#specify the list name 
$list = $site.Lists["Test"] 
$listitems = $list.Items 
$user = get-SPuser -Web $site -Identity $newuser 
#loop through each list item and update 
foreach ($listitem in $listitems) 
    { 

        $listitem["Author"] = $user 
        $listitem["Editor"] = $user        
        $listitem.Update() 
        write-host $listitem["Name"] "has been updated. The author and editor has been set to $user" 

    } 
$site.Update() 
$site.Dispose()

Hope it helps!