We are use a CAD software that use a own printer driver. In Windows 2008 we get permission denied when we spool this plot to the UNC path for the printer default_outFile/auto_overwrite = "\\Server\Lex_X945e_PS3" When we are logged in with administrator this works. I have tried to change the permission and also add the user to the printer operator group, But still access denied when printing. Before we used a SBS 2003 Prem server and we did not have this problem. Any suggestions Frode

I was having the exact problem. I finally found out why. Standard users do not have write permission to the spool directory (c:\windows\system32\spool\printers). Once I gave the Users group write permissions to this directory, UNC printing started working.