You tell the user's client cache to hold on to the Web page, while telling your M-Business Sync Server's shared cache to discard the page, by adding a private directive in addition to the max-age directive. In other words, you want your HTTP header to look something like

Cache-Control: max-age=10800, private

If you were creating the daily weather report using a Perl script, your Perl script might contain the lines:

print "Content-type: text/html\n";

print "Cache-Control: max-age=10800, private\n";

The max-age value is still used by the client cache. But your M-Business Sync Server will ignore it entirely.