SOLVED; problem was due to cleanup printers using cleanspl. After uninstalling 2X applicationserver, TS does not redirect printers anymore. Checked all (to my knowledge): registry for printsubs, GPO, local policy, TSCC setting, drivers, security rights on spool folder. Did I mis something here? The strange thing is, that TS adds the drivers of the client printers, but does not show/install the printer.
