SEP only adds exclusion for Exchange ( iguess you must be having exch 2007 )
to check the exclusions in registry llok at
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\AV\Exclusions\Exchange Server ( for 32 bit)
HKEY_LOCAL_MACHINE\Software\Wow6432node\Symantec ( for 64 bit)
Also check
Preventing Symantec Endpoint Protection 11.0 from scanning the Microsoft Exchange 2007 directory structure
http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2007072619121148
For SQL Follow this:
Guidelines for choosing antivirus software to run on the computers that are running SQL Server
http://support.microsoft.com/kb/309422
For your Active Directory exclude SYSVOL.