Modify a "Created By" Sharepoint List Column

jtsables by default the Created By column is read-only but you can change it with the following flow which is triggered from a button in the SharePoint list/library.

The Uri field is
_api/web/lists/getByTitle('Site Pages')/items(ID)/validateUpdateListItem

and the Body field is

{
"formValues":[
{
"FieldName": "Author",
"FieldValue": "[{'Key':'i:0#.f|membership|{OWNER EMAIL}@wsp.com'}]"
},
{
"FieldName": "Editor",
"FieldValue": "[{'Key':'i:0#.f|membership|{OWNER EMAIL}@wsp.com'}]"
}
],
"bNewDocumentUpdate": true
}

Then create a single line of text column in your SharePoint list and format it in advanced mode with the following JSON, changing the flow ID to your flow and other parameters as necessary.

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "button",
  "txtContent": "Change Created By",
  "customRowAction": {
    "action": "executeFlow",
    "actionParams": "='{\"id\":\"5eddbaca-e7df-46f4-b968-f009ed9f69ec\", \"headerText\":\" ' + [$Title] + '\",\"runFlowButtonText\":\"Go\"}'"
  },
  "style": {
    "background-color": "#fff5dd",
    "border-radius": "10px"
  }
}

Rob
Los Gallardos
Microsoft Power Automate Community Super User.
Principal Consultant, SharePoint and Power Platform WSP Global (and classic 1967 Morris Traveller driver)