Hi @Jia Hui , error code 500571 typically indicates that the user account is not authorized to access the application. This error can occur when the user is trying to access an application that requires administrator consent, but the administrator has not yet granted consent for the user to access the application.
To resolve this issue, you can try the following steps:
- Contact the administrator of the Azure AD tenant and ask them to grant consent for the application that you are trying to access.
- If you are the administrator of the Azure AD tenant, you can grant consent for the application by following the steps in this article: https://docs.microsoft.com/en-us/azure/active-directory/manage-apps/configure-user-consent
- If the application requires multi-factor authentication (MFA), make sure that you have set up MFA for your account and that you are using the correct authentication method.
- If you are still unable to access the application, try clearing your browser cache and cookies, or try accessing the application from a different browser or device.
Please let me know if you have any questions and I can help you further.
If this answer helps you please mark "Accept Answer" so other users can reference it.
Thank you,
James