Hello@Mahalakshmi R
If you were taking a Microsoft exam and you need to reschedule it with the same voucher code, you may be able to do so if the voucher has not expired yet.
According to Exam reschedule and cancellation policy | Microsoft Learn
Be sure to reschedule or cancel exam appointments at least 24 hours before your scheduled exam or your fee will be forfeited. If you used a company-purchased voucher, the voucher will be forfeited. Visit registering and scheduling an exam to review the latest updates to the exam scheduling policy. To check if your voucher code is expired or not, you can do the following:
- Sign into Learn using the same personal Microsoft account (MSA) you use to sign into your certification profile.
- In the certification profile, click on the pencil icon to activate editing
- Check the Expiration Date field for your voucher code. If it is blank, it means your voucher code does not expire.