When the print properties or preferences of a shared printer are accessed on a Microsoft Windows client PC, the print driver is re-vended (downloaded/installed) from the server, and an Event ID: 20 is generated in the Event Log. Event ID: 20 indicates that a print driver has been added or updated. Slow client UI response and/or slow server performance may also be reported. In some instances, the driver may generate over 100 Event ID: 20 entries in the Event Log.
This issue can occur if the privileges on the print server are set such that users with print access also have manage permissions on the print queue.
