Hi Pragati,
Thank you for contacting the Microsoft Community.
I understand the challenges you faced while booking your exam and acknowledge the importance of timely and accurate scheduling. I will provide you with the necessary information to address this issue.
To investigate the error or issue you are encountering, please provide a complete recording of the entire process starting from the sign-in page until the error occurs along with the requested information via private message. For Windows devices, use the Snipping Tool to record the steps. After opening it, select the video icon, click "New," draw the area to record, press "Start" to begin, and "Stop" to end the recording. For MAC devices, follow the instructions in this link.
Meanwhile, if you are an active ESI Learner (part of an organization affiliated with the Enterprise Skills Initiative), please contact the ESI support team directly. I've sent their contact details in a private message. Kindly use your work email address when creating a ticket with them. They typically respond within 3-5 business days.
If there's anything else I can do to assist you or if you need further support, please don't hesitate to let me know. I'm here to help.
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. Thank you.
Best regards,