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Updates to High Volume Email (HVE) Public Preview

The_Exchange_Team's avatar
The_Exchange_Team
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Oct 09, 2024

High Volume Email (HVE) for Microsoft 365 allows customers to send large volumes of email, primarily to internal recipients without any recipient rate limits at GA (the public preview has a limit of 100,000 recipients per day per tenant).

HVE is a companion feature to Azure Communication Services (ACS) for email, which offers high-volume transactional, bulk, and marketing emails to external recipients. The public preview of HVE was released on April 1, 2024.

Today, we’re excited to announce some new enhancements to the HVE public preview.

Added Support for OAuth

Support for OAuth is now available in the public preview.  The benefits of using OAuth include enhanced security and seamless integration with Microsoft 365. You can use application or delegated permission. Instructions for enabling OAuth for HVE are at OAuth authentication for high volume emails for Microsoft 365.

Improved Account Setup

In addition to adding support for OAuth, we have also enhanced the experience in Exchange admin center for account setup. You can now select your managed domain via a drop-down menu as shown below.

Final Naming for PowerShell Cmdlet Parameters

We have renamed the LOBAppAccount parameter for the New-MailUser cmdlet to HVEAccount. An example of the finalized naming is shown below:

New-MailUser -HVEAccount -Name "TestAccount@contoso.onmicrosoft.com" -PrimarySmtpAddress "TestAccount@contoso.com”

The previous LOBAppAccount parameter will be available for a short while, but we will begin phasing it out in the coming weeks.

Support for Federated Domains

Federated domains are now compatible with HVE accounts. To implement HVE for a federated domain, use the following command where contoso.com represents a federated domain. Any managed domain can now be included in the Name field.

New-MailUser -HVEAccount -Name "TestAccount@contoso.onmicrosoft.com" -PrimarySmtpAddress "TestAccount@contoso.com”

General Availability

We are targeting general availability starting September 2025 and expected to be completed by early October 2025. Our focus for the public preview is to ensure stability and reliability and introduce additional features like billing and reporting.

We’d love to get your feedback on HVE!  Feel free to leave your comments and feedback below.

Microsoft 365 Messaging Team

Updated Nov 06, 2024
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  • Simone_Liebal's avatar
    Simone_Liebal
    Icon for Microsoft rankMicrosoft
    Oct 11, 2024

    TobiasKal thank you for your question!
    We have heard this request before. Currently, there is no definite list of IP addresses for the HVE service available. However, we are looking into this. Could you help me understand your requirements in this context and why this is something that you would need - is there a flow you are specifically concerned about (incoming / outgoing)? 

  • Simone_Liebal's avatar
    Simone_Liebal
    Icon for Microsoft rankMicrosoft
    Oct 11, 2024

    JrouziesM and SteveTH I'll answer your questions together, as they seem to have a similar use case. High Volume Email service is primarily intended for use with line-of-business applications. As such, the ability to SendAs via a regular mailbox is not on our roadmap for GA at this time. However, we greatly value your feedback and encourage you to keep sharing your needs and suggestions as we continue to look at future updates for HVE!

    Faber77 To ensure I fully understand your needs, could you please provide more details about what you are looking to achieve with the HVE account when using the new-remotemailbox command in a hybrid environment? Any additional information would be very helpful.

  • Faber77's avatar
    Faber77
    Copper Contributor
    Oct 10, 2024

    Hi The_Exchange_Team but in an hybrid environment where all mailbox are only cloud but we sync our directory con Entra Connect, and create the mailbox with the command new-remotemailbox can we add in something way the attribute that it will be used for HVE? I didn't see any option actually in new-remotemailbox to make an HVE account.

     

    Thanks.

  • SteveTH's avatar
    SteveTH
    Brass Contributor
    Oct 10, 2024

    Hi The_Exchange_Team 

    Will SendAS or SendOnBehalf now also be possible with the HVE accounts? To send E-Mail as existing Mailbox Address.

    Regards.

  • JrouziesM's avatar
    JrouziesM
    Brass Contributor
    Oct 10, 2024

    Is there any plan for HVE to be usable by some normal users accounts? (maybe through some licensing)

     

    Marketing often wants to send communication from Directors accounts / address, which causes their own account to get locked 24h cause it sent to too many recipients.