Hi Prathyusha,
Thank you for contacting the Microsoft Community.
I recognized that you want to know if you need to pay another amount in retaking the AZ-900 exam. Allow me to provide further information about this.
@teriaavibes, thank you for your insight.
Indeed, you may make up to 5 attempts in a year and in every retake, you must pay the $99 as it will be considered as a new appointment.
In addition, since you mentioned that your company provided you with a voucher code, I highly recommend coordinating directly with ESI support to ask options in retaking the exam with the discount since they are responsible in handling company discounts under your organization. You may reach out to the link below:
ESI SUPPORT: https://aka.ms/esisupport
Furthermore, you may also coordinate with your company if they can provide you with another voucher code that you can use in taking the AZ-900 exam.
If you need further assistance after interacting with ESI support, kindly respond to the private message that I initiated along with the CASE ID they have provided.
In the future, if you want to prepare for the AZ-900 exam, we do have a practice assessment to help you hone your skills and be prepared for the AZ-900 exam. To take the assessment you may visit this link: Take a free practice assessment
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages.