Specifies if system certificate stores must be used.
This property works on Windows and Mac OS X.
On Windows, set this property to true to include Windows Certificate Stores when TElCertificateValidator is looking for the CA and root certificates, or when checking if the certificate is blocked or trusted. Note, that use of Windows stores slows down certificate validation because it takes time to check if certain certificate is in the store.
On Mac OS X, the logic of this property is the same as on Windows.
Set this property to false if you maintain your own certificate lists and don't want to spend extra time searching for certificaets in system stores.