Printing to XPS large Spool File

Dear Community

I need to Print Axapta Invoices to a XPS Printer. The spool file gets very large.

It seams like the conversion makes it too big (somehow). Its much smaller wenn printing it to the PDF Printer.

Do you have an idea why that is and how to et rid of it?

I need to use XPS because Axapta doesnt support EMF-Printers and ist the only way to print with a published terminal server environment. I cant use real print drivers because people form all over the world connect to a xenapp Desktop and theire Printer gets connected into theire terminal server connection using citrix universal print Driver.

thanks for any help

Cheers David