Instead of exporting to, try linking from...
in excel goto data>get externa;l data>new database query...
select msaccess database* from the list and follow the wizard from there.
once the data is returned, you can right click in the data area and select prperties such as refresh on open of the xls, fill down any formulas automatically etc.
that way each time you open the xls it is refreshed with any new data in your access table or query