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Problem I need to change the Created By (Author) of list item without increasing version number via PowerAutomate Flow but unfortunately there's no predefined action that is ready for use. Solution Use list API via Send an HTTP request to SharePoint action as follows. Note: to prevent new version of list item from being created, set "bNewDocumentUpdate":true   {      "inputs" : {          "host" : {              "connection" : {                  "name" :  "@parameters('$connections')['shared_sharepointonline']['connectionId']"             }         },          "method" :  "post" ,          "body" : {              "method" :  "POST" ,              "uri" :  "_api/web/lists/getbytitle('@{variables('ListTitle')}')/items(@{variables('ListItemID')})/validateUpdateListItem" ,              "body" :  "