I have installed a printer on my Widows 2003 Server (it's both application and database server for my SAP system) and it worked fine. I created a "standard printer" output device in SAP and everything was fine too.
Today, however, it doesn't print from SAP, although I haven't changed anything. On OS level it still prints fine. When I go to SPAD and check connection, I get a message "Unable to reach the remote host spool system". What could happen overnight? What checks could I perform (both on OS and SAP) to track down the problem?