MAPI_NT_SERVICE
const mapi.MAPI_NT_SERVICE;The caller is running as a Windows NT service. Callers that are not running as a Windows NT service should not set this flag; callers that are running as a service must set this flag.
The caller is running as a Windows NT service. Callers that are not running as a Windows NT service should not set this flag; callers that are running as a service must set this flag.