Con este script podeis crear columnas del tipo Lookup a una lista en SharePoint: $web = Get-SPWeb "WEB_URL" $list = $web.Lists["LIST_NAME"] $lookupFieldXML = '<Field Type="Lookup" DisplayName="NEW_FIELD" Required="FALSE" EnforceUniqueValues="FALSE" List="{LIST_ID}" ShowField="Title" UnlimitedLengthInDocumentLibrary="FALSE" RelationshipDeleteBehavior="None" SourceID="LOOKUPLIST_ID" StaticName="NEW_FIELD" Name="NEW_FIELD" ShowInDisplayForm="TRUE" ShowInEditForm="TRUE" ShowInNewForm="TRUE" RowOrdinal="0" />' $a = $list.Fields.AddFieldAsXml($lookupFieldXML, $true, [Microsoft.SharePoint.SPAddFieldOptions]::AddFieldToDefaultView); $list.Update(); $web.Dispose();