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It seems you are encountering an unexpected error while trying to register for the AZ-500 exam on Microsoft Learn. This issue may be related to your account being blocked by Pearson Vue, which can happen due to multiple failed payments. To resolve this, you should contact Pearson Vue support to lift the block on your account.
Additionally, if the issue persists, you can reach out to Microsoft Certification Support for further assistance with scheduling your exam. They can help address any technical issues you may be facing during the registration process.
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