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MC1243552 Stay informedUpdated messageNew featureUser impactAdmin impact

High Volume Email for Microsoft 365 now generally available

Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.
Exchange Online
Microsoft 365 admin center

Rollout

Roadmap
382633

Rollout dates are often only in the text. When Microsoft moves them, the change shows under "What changed".

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions this installation saw
  • Seen 20 May 2026 early April 2026
  • Seen 31 Mar 2026 June 2026, March 2026, late March 2026 → June 1, 2026
  • Seen 12 Mar 2026 May 2026 → June 2026

Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.

What the notice says

Microsoft’s text, with source markup removed
Updated May 20, 2026: We’re reminding you that billing for High Volume Email will begin soon. To avoid service disruption, ensure your billing configuration is set up before billing starts. We have updated the content below. Thank you for your patience.  Introduction Exchange Online includes email‑sending limits based on three factors: recipient rate limit, recipient limit, and message rate limit. To support customers whose internal communication needs exceed these standard limits, we are introducing High Volume Email (HVE) for Microsoft 365. HVE is designed for large‑scale internal communications and integrates with business applications and devices to support operational and mass‑mailing scenarios. It uses a transactional pricing model based on the number of recipients. Usage will be metered starting June 1, 2026, based on the number of expanded delivered recipients. Pricing is $42 per one million recipients (equivalent to $0.000042 per recipient) through Microsoft commerce. To ensure uninterrupted service, you must configure your billing settings before billing starts. If billing is not configured by this date, your organization may experience interruption in High Volume Email message delivery until billing is set up. This message is associated with Microsoft 365 Roadmap ID 382633. When this will happen Public Preview: Available now. General Availability (worldwide): Available now.  Billing for High Volume Email will begin on June 1, 2026. How this affects your organization Who is affected Admins managing Exchange Online mail flow and reporting Organizations with large-scale internal email distribution needs What will happen A new High Volume Email page will appear under Mail flow in the Exchange admin center. Admins can create and manage Mail User accounts enabled for HVE. HVE accounts use a dedicated SMTP endpoint for high-volume sending. A new High Volume Email report will appear under Reports > Mail flow to help admins monitor HVE usage per account. HVE is opt‑in; it does not modify default sending limits or existing mail flow behavior. Screenshot 1 - Create new HVE specific accounts:  Screenshot 2 - Manage HVE accounts, including assigned billing policies: What you can do to prepare To continue using High Volume Email without interruption: (Optional) Review your current usage of High Volume Email. For more information, see View HVE usage report. (Required) Set up billing configuration for High Volume Email. For more information, see Set up Billing for High Volume Email. (Required) Verify that your billing configuration is active and correctly associated with your tenant. You may want to: Review and update any internal documentation that describes email‑sending processes. Learn more about setup and configuration: Manage high volume emails for Microsoft 365 Public preview | Mail flow best practices | Exchange Online | Microsoft Learn Compliance considerations No compliance considerations identified. Review as appropriate for your organization.

What changed

Between archive captures, newest first

  1. Only details this page does not show changed.

  2. Updated March 31,May 20, 2026: We’re reminding you that billing for High Volume Email will begin soon. To avoid service disruption, ensure your billing configuration is set up before billing starts. We have updated the content.content below. Thank you for your patience.  Introduction Exchange Online includes email‑sending limits based … It uses a transactional pricing model based on the number of recipients. HVEUsage will be metered starting June 1, 2026, based on the number of expanded delivered recipients. Pricing is currently available at no additional cost, with metered$42 per one million recipients (equivalent to $0.000042 per recipient) through Microsoft commerce. To ensure uninterrupted service, you must configure your billing starting June 1, 2026. Pricing informationsettings before billing starts. If billing is now published. For more information, seenot configured by this date, your organization may experience interruption in High Volume Email Is Now Available in Exchange Online.message delivery until billing is set up. This message is associated with Microsoft 365 Roadmap ID 382633. When this will happen Public Preview: Available now. General Availability (worldwide): Rolling out now and rollout is expected to complete early AprilAvailable now.  Billing for High Volume Email will begin on June 1, 2026. How this affects your organization Who is affected Admins managing Exchange … HVE accounts, including assigned billing policies: What you can do to prepare No actionTo continue using High Volume Email without interruption: (Optional) Review your current usage of High Volume Email. For more information, see View HVE usage report. (Required) Set up billing configuration for High Volume Email. For more information, see Set up Billing for High Volume Email. (Required) Verify that your billing configuration is required to prepare for this change.active and correctly associated with your tenant. You may want to: Review and update any internal documentation that describes …

    • Title High Volume Email for Microsoft 365 upcoming general availability → High Volume Email for Microsoft 365 now generally available

    Updated March 12,31, 2026: We have updated the content. Thank you for your patience.  Introduction … a transactional pricing model based on the number of recipients. HVE is currently available at no additional cost during Public Preview. Pricing for General Availability (GA) will be announced with the GA release, and billing will begin in June 2026 following a free promotional period after GA cost, with metered billing starting June 1, 2026. Pricing information is now published. For more information, see High Volume Email Is Now Available in March 2026.Exchange Online. This message is associated with Microsoft 365 Roadmap ID 382633. When this will happen Public Preview: Available now. General Availability (worldwide): Rollout begins in late March 2026 andRolling out now and rollout is expected to complete early April 2026. How this affects your organization …

    • Tags New feature, User impact, Admin impact → Updated message, New feature, User impact, Admin impact

    Updated March 12, 2026: We have updated the content. Thank you for your patience.  Introduction Exchange Online includes email‑sending limits based on three factors: recipient rate … will be announced with the GA release, and billing will begin in MayJune 2026 following a free promotional period after GA in March 2026. This …

  5. · first version seen

Linked documentation

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The notice links to no Microsoft Learn or Support page that this installation reads.

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

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What this page cannot tell you
  • Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
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