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MC787382 – Exchange Online to introduce External Recipient Rate Limit

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check before: 2024-05-11

Product:

Exchange

Platform:

Online, World tenant

Status:

Change type:

Feature update, Admin impact

Links:

Details:

Summary:
Beginning January 2025, Exchange Online will enforce a new External Recipient Rate limit of 2000 recipients per 24 hours, introduced in two phases for new and existing tenants. This limit is part of the overall 10000 Recipient Rate limit, aiming to prevent abuse of services. Organizations exceeding this limit should consider Azure Communication Services for Email.

Details:
Today, we are announcing that, beginning in January 2025, Exchange Online will begin enforcing an external recipient rate limit of 2000 recipients in 24 hours.
Exchange Online does not support bulk or high-volume transactional email. We have not enforced limiting of bulk email until now, but we plan on doing so with the introduction of an External Recipient Rate (ERR) limit. The ERR limit is being introduced to help reduce unfair usage and abuse of Exchange Online resources.
[When this will happen:]
The new ERR limit will be introduced in 2 phases:
Phase 1 - Starting January 1, 2025, the limit will apply to cloud-hosted mailboxes of all newly created tenants.
Phase 2 - Between July and December 2025, we will start applying the limit to cloud-hosted mailboxes of existing tenants.

Change Category:
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Scope:
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Release Phase:

Created:
2024-04-27

updated:
2024-04-27

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