3.2.1.4.3.2.8 PropID = 0x00000008 (CR_PROP_SHAREDFOLDER) "Shared Folder Path"

The client has requested the UNC path that is used as a shared folder for the CA. If the CA implements the Config_Configuration_Directory data, the CA MUST return its value as a [UNICODE] string, through a CERTTRANSBLOB (section 2.2.2.2) structure. If the CA does not implement the Config_Configuration_Directory data, the CA MUST return a nonzero error. The error SHOULD be 0x80070002. For more information about Windows implementation and usage for shared folders, see [MSFT-SHAREDFOLDER].<110>

Marshaling rules for CERTTRANSBLOB are specified in section 2.2.2.2.