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Microsoft Changes Strategy for High Volume Email
A surprise announcement brings the news that the Exchange Online High Volume Email (HVE) solution will only deliver messages to internal recipients from June 2025. Azure ECS is now the sole offering for sending large volumes of email to external recipients. On the upside, HVE will support basic authentication until September 2028 to give tenants the chance to upgrade devices and apps.
https://practical365.com/hve-new-strategy/
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Microsoft just announced that starting June 2025, the Exchange Online High Volume Email (HVE) service will only send emails to internal users. For sending bulk emails to external recipients
