Hi @Vinoyee Poulose ,
To open a Microsoft Azure support case, you can follow along here:
Create an Azure support request
https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request
For general Microsoft support for business, follow along here:
https://support.serviceshub.microsoft.com/supportforbusiness
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Best regards,
Leon