How to update the values of Editor or Author fields in a SharePoint list (not a document library) item via web services?

I did read somewhere that updating the fields would be possible for lists (but not for document libraries).

For example, I have understood that it should be possible to update a listitem via Lists.asmx / UpdateListItems and passing Editor and Author fields as ID;#AccountName (15;#DEV\User)

However I don't seem to get this to work. Any ideas?

  • Can you explain what you're actually trying to do? Those fields are system fields which you shouldn't update..
    – Kit Menke
    Nov 1, 2013 at 20:43
  • For communication between SharePoint and a .NET MVC application in a NTLM on-premises environment (without Kerberos delegation): Users submit an MVC form which initiates a web Service call to SharePoint in order to update a listitem. Here technically MVC IIS process does the updates (NTLM without delegation) so why change created/modified? this is done purely from Ux perspective because end users are creating views to the SharePoint lists, and they expect the editor to be the end user instead of a system account.
    – thomius
    Nov 3, 2013 at 20:13
  • I think one argument not to update the fields would be that we lose audit information from technical perspective (so I clearly understand why this is not easy) but I think here and in similar cases it might nevertheless be better to change those values (with a feasible solution).
    – thomius
    Nov 3, 2013 at 20:26
  • The preferred method would be to make the web service request on behalf of the current user (using their current credentials).
    – Kit Menke
    Nov 4, 2013 at 17:47

1 Answer 1


Web services operate under the credentials of the user executing the request. You don't have to pass that information in, Sharepoint will handle it automatically on creation/edit of an item.

  • Due to double-hop the credentials of process account would be used in non-Kerberos environments.
    – thomius
    Oct 29, 2013 at 19:55
  • Setting Created By and Modified By fields as non-read-only would solve this but would it cause issues?
    – thomius
    Oct 29, 2013 at 20:20
  • Got this working after updating old Web References to the more recent Service References.
    – thomius
    Nov 9, 2013 at 17:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.