Tech support links :

Microsoft :	http://support.microsoft.com/directory/
Novell :	http://support.novell.com/index.html
Citrix :	http://www.citrix.com/support/
Network Associates (McAfee) :	http://www.networkassociates.com/us/support/
Veritas (BackupExec) :	http://support.veritas.com/
Symantec :	http://www.symantec.com/techsupp/consumer.html