Hi,
Currently Email in Azure Communication Services is in Public Preview and the data location is limited to United States. Please note below excerpt from the documentation pages:
This feature of Azure Communication Services is currently in public preview. Preview APIs and SDKs are provided without a service-level agreement, and are not recommended for production workloads. Certain features might not be supported or might have constrained capabilities. For more information, see Supplemental Terms of Use for Microsoft Azure Previews.
Email in Azure Communication Services
https://learn.microsoft.com/en-us/azure/communication-services/concepts/email/email-overview
If the above is helpful please click Accept Answer.
Thanks.
-TP