Hello Venkatesh,
Thank you for contacting the Microsoft Community.
I am sorry to hear that the On VUE technical issue you encountered during your exam prevented you from taking your test. I know that this is something very important to you. Allow me to assist you by providing recommendations with smoothly rescheduling your exam.
As I have checked, I found that candidates who encountered any technical challenges they had prior to, during, or after the exam are expected to submit an incident report to their Exam Delivery provider. As they have access to your appointments, their support team will look into the matter and help you to reschedule your exam.
Furthermore, you can contact them using the following details below:
For Pearson VUE: https://home.pearsonvue.com/microsoft/contact (select your region)
For Certiport: https://certiport.pearsonvue.com/Support.aspx
In case you are unable to reach them, you can provide me with the Case ID number through private message along with the requested information so we can further investigate.
Otherwise, if this solves your problem, please indicate “Yes” to the question and the thread will automatically be closed and locked. In case we do not receive a response, the thread will be closed and locked after one business day. Please be advised that after the case is locked, we will no longer be able to respond, even through Private Messages. If the resolution provided did not resolve the issue, please post a new question.
Regards