The Lists.asmx web service enables you to CRUD items on a SharePoint list (https://msdn.microsoft.com/en-us/library/lists.lists.updatelistitems(v=office.12).aspx) The default options for the person field however does not work e.g: i:0#.w|domain\username Display Name domain\username Email To make it work pass one of the following: Single user = [ID];#[Person] Multi user = [ID];#[Person];#[ID];#[Person];#[ID];#[Person];# -1;#Display Name [...]