Creates a conditional forwarder associated with your AWS directory. Conditional forwarders are required in order to set up a trust relationship with another domain. The conditional forwarder points to the trusted domain.
/// A client exception has occurred.
///
/// The specified directory is unavailable or could not be found.
///
/// The specified entity already exists.
///
/// The specified entity could not be found.
///
/// One or more parameters are not valid.
///
/// An exception has occurred in AWS Directory Service.
///
/// The operation is not supported.
///