let
Source = Folder.Files("X:\Chemin\Vers\Fichiers"),
#"Lignes filtrées" = Table.SelectRows(Source, each ([Name] = "Classeur1.xlsx" or [Name] = "Classeur2.xlsx")),
#"Type doc extrait" = Table.AddColumn(#"Lignes filtrées", "TypeDoc", each Table.FirstValue( Excel.Workbook([Content]){[Name="TypeDoc"]}[Data]))
in
#"Type doc extrait"