Hi Nato,
Thank you for contacting the Microsoft Community.
I understand you are seeking assistance in rescheduling your exam as I know how important it is for you to proceed without any roadblock for you to showcase your knowledge of this subject. Allow me to provide you with recommendations and options for your concern.
Since you are having an issue locating your scheduled exam, for me to have a visibility on what error you encounter, kindly provide a step-by-step screenshot of the process using Problem Steps Recorder (PSR) (click this link for MAC device), starting from the sign-in page up until the last step, along with the requested information through the private message I have initiated. This will allow me to further investigate your case and provide more options.
Meanwhile, if you have utilized a company discount on the AI-900 exam, I recommend you directly contacting ESI Support Team (they typically respond 3-5 business days) as they cater questions/concerns related with ESI discounts and they will coordinate with Pearson VUE on how you can proceed with the exam. Kindly refer to the private message for their contact information and make sure to log in using your work email address.
If no company discount being utilized, for immediate assistance, we recommend our test takers to contact Pearson VUE support (they typically respond 3-5 business days) directly as they have the tools to modify your exam and can investigate what happened to provide options available for you.
After contacting the above-mentioned Support Team, kindly provide the Case ID or Support Request Number in the private message for us to monitor your case as well and to provide assistance in your case.
However, to give you a heads up, for online exams with Pearson Vue, it is suggested to use your personal laptop or personal computer as sometimes company laptops or company computers have company restrictions.
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,