Location where authentication errors are posted to.
This property is automatically filled by the VerifyEnrollment method, to the same value as the ACSURL. If it is required that errors be posted to a different address, this property can be changed before calling CheckAuthenticationResponse. Only errors generated by the CheckAuthenticationResponse method will be posted to this URL. Errors generated by the RequestCardRanges and VerifyEnrollment methods will be posted to the EnrollmentErrorURL. If this property is set to empty before calling the CheckAuthenticationResponse method no errors will be posted.