I need to count the number of WORKING days between two dates in a calculated column in SharePoint 2007. Does anyone know of a formula to do this? I know that "=DATEDIF(Column1, Column2,"d")" provides the total number of days, but the customer wants only the number of WORKING days, i.e. M-F. Excel has a formula for it...can't seem to find one for SharePoint though. Anybody?