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Hi Alan Yue,
Thanks for reaching out to Microsoft Q&A.
Reach out to Pearson Vue to rescheduling your exams.
Register and schedule an exam
https://learn.microsoft.com/en-us/certifications/register-schedule-exam
Pearson VUE Customer service
https://home.pearsonvue.com/Test-takers/Customer-service.aspx
Pearson VUE contact / chat
https://home.pearsonvue.com/microsoft/contact
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