Why do I not see the ‘CreateTsMedia’ and ‘SMSAdminUI’ logs in the ‘Logs’ directory on my ConfigMgr / SCCM 2007 Site Server?

I understand ConfigMgr creates various logs but why do I not see the CreateTsMedia and SMSAdminUI logs in the ‘Logs’ directory on my ConfigMgr / SCCM 2007 Site Server?