The Second Shot vouchers through Learning Rewards program apply to all Microsoft IT Professional and developer certification exams and all Microsoft Dynamics exams (all 070 exams). Second Shot vouchers for Academic exams (072 and 073 exams) are not available.
You may redeem the vouchers at a Prometric Testing Center in person, by telephone, or online at www.prometric.com/microsoft.
Each voucher is valid for one exam retake (if the first attempt failed) and one Practice Test discounted 40% before June 30, 2010.
You can learn more about the advantages of becoming a Microsoft Certified Professional here.