Hello Stu,
Thank you for contacting the Microsoft Community.
I recognize how important it is for you to reschedule your exam immediately. Allow me to help you reschedule AZ-900.
If you are unable to see your upcoming exams, there is a possibility that you are using a different login credentials and a duplicate profile has been created.
Below are the common reasons why duplicate profiles are created:
· Different information such as email, name format, home address, phone number and etc. were used during the exam registration/ visiting the Certification Dashboard.
· The Microsoft Certification profile might not yet have associated to your registered email address.
· The system did not recognize your previous MC ID in exam registration/visiting the Certification Dashboard.
With this, please make sure to login using the correct personal Microsoft account. If the appointment is still missing, please provide us with the requested information in the private message so I can further investigate.
Meanwhile, for immediate assistance, you can also contact Pearson VUE to help you reschedule the exam. Kindly refer to the link below for their contact details and select your region to ensure that you will reach the correct support group.
https://home.pearsonvue.com/microsoft/contact
Note: you cannot schedule, reschedule, or cancel your exam appointment by email.
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.
Regards,