I have a Citix Presenation 4.5. I only publish application from one server. When users logon to Citrix session, some problem occur when printing. When they use Excel 07, they can select printer and print. However, when they logon and using Outlook 07 (with different session ID, on the same server), they can't select printer. Error message is user need to install printer first. I install the same HP universal printer PCL5e driver on server and client workstation. (print from Excel session, not in Outlook session). On the server side, both session auto creat the printer.