Hi @Mahnoosh Montazer ,
To change the billing address for Microsoft 365, please check here:
https://learn.microsoft.com/en-us/microsoft-365/commerce/billing-and-payments/change-your-billing-addresses?view=o365-worldwide
To change the billing address for Microsoft Azure, please have a look here:
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/change-azure-account-profile
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Best regards,
Leon