ChangeIntelIT change radar
Public mode

No access to your tenant or devices. Every item links to its source. What this means

Some sources, documents or advisories need attention: 271/272 feeds/APIs · 469/469 docs · 8/9 advisories · checked 16:49 UTC Customize Public modeDiscuss ChangeIntel on Discord
MC1113112 Stay informedUpdated messageNew featureUser impactAdmin impact

Microsoft Exchange Online | Releasing Multi-Geo In-Region Routing

From 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
410245

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 30 Oct 2025 early December 2025
  • Seen 8 Aug 2025 early August 2025, end of August 2025, late October 2025 → end of October 2025, early December 2025, late December 2025

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, safely structured

Updated October 30, 2025: We have updated the timeline. Thank you for your patience.

Introduction

Multi-Geo In-Region Routing (IRR) enables customers to control the routing of inbound emails. Using IRR, customers can set the geo-region that inbound mail should be routed to for specific Accepted Domains.

This message is associated with Microsoft 365 Roadmap ID 410245.

When this will happen

Public Preview: We will begin rolling out in early October 2025 and expect to complete by end of October 2025.

General Availability (Worldwide): We expect to begin rolling out in early October 2025 (previously early December) and expect to complete by late December 2025.

How this will affect your organization

In-Region Routing (IRR) is disabled by default. If you do not plan to use this feature, no action is required.

For domains where you choose to enable IRR, the feature allows you to route inbound emails to accepted domains associated with specific geo-regions. When these domains are aligned with users located in the same geo-region, emails are fully processed and stored within the recipient’s region.

If your organization uses Microsoft Purview capabilities such as Data Loss Prevention (DLP), retention policies, or eDiscovery, you may need to review and adjust those policies to ensure they align with the new regional routing behavior.

What you need to do to prepare

  • Ensure that admins have the necessary permissions to manage accepted domains and access to either Exchange Online PowerShell or to the Microsoft 365 admin center.
  • Review your domain configurations and identify users located in secondary geo-regions.
  • Prepare to configure accepted domains with the new geo-region property.
  • Review the licensing terms, as Multi-Geo licenses will be indefinitely required to use In-Region Routing:
    • https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-multi-geo?view=o365-worldwide#licensing
    • https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-multi-geo?view=o365-worldwide#getting-started
  • Review the documentation for configuring the feature: Configure Multi-Geo In-Region Routing (In Preview) - Microsoft 365 Enterprise | Microsoft Learn"

We value your feedback and want to hear from you if you have any questions or concerns. Please comment or contact us through the M365 Admin Center if you need any assistance.

Compliance considerations

  • Does the change alter how existing user data is processed, stored, or accessed? - Yes. Emails are stored in-region based on domain configuration.
  • Does the change modify, interrupt, or disable any Purview capabilities? - Maybe. Depends on how DLP or retention policies are scoped by region.
  • Does the change alter how admins can monitor, report on, or demonstrate compliance activities? - Maybe. Regional routing may affect reporting granularity.

What changed

Between archive captures, newest first

  1. … 2025: We have updated the timeline. Thank you for your patience.      Introduction We’re introducing Multi-Geo In-Region Routing (IRR) for Exchange Online, a new capability that helps organizations meet regional data residency requirements by allowing enables customers to control the routing of inbound email routing to be aligned with user locations. With emails. Using IRR, adminscustomers can configure accepted domains to route messages directly to a designated geo-region, ensuring set the geo-region that email data is processed and stored entirely within the recipient’s region—even if it differs from the tenant’s primary location. inbound mail should be routed to for specific Accepted Domains. This helps organizations meet compliance requirements without compromising email delivery performance. This message is associated with Microsoft 365 Roadmap ID 410245. When this will … same geo-region, emails are fully processed and stored within the recipient’s region. This ensures that data remains within the user’s Preferred Data Location (PDL), supporting stronger data sovereignty and compliance with regional regulations.   If your organization uses Microsoft Purview capabilities such as Data Loss Prevention …

  2. Updated August 8,October 30, 2025: We have updated the timeline. Thank you for your patience.       Introduction We’re introducing Multi-Geo In-Region Routing (IRR) for Exchange Online, a new … 2025. General Availability (Worldwide): We expect to begin rolling out in early DecemberOctober 2025 (previously early December) and expect to complete by late December 2025. How this will affect …

  3. Updated July 31,August 8, 2025: We have updated the content.timeline. Thank you for your patience.  Introduction We’re introducing Multi-Geo In-Region Routing (IRR) for Exchange Online, a new … this will happen: Public Preview: We will begin rolling out in early AugustOctober 2025 and expect to complete by end of AugustOctober 2025. General Availability (Worldwide): We expect to begin rolling out in early OctoberDecember 2025 and expect to complete by late OctoberDecember 2025. How this will affect your organization: In-Region Routing (IRR) is disabled …

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

    Updated July 31, 2025: We have updated the content. Thank you for your patience.  Introduction We’re introducing Multi-Geo In-Region Routing (IRR) for Exchange Online, a new … Prepare to configure accepted domains with the new geo-region property. Review the licensing terms, as Multi-Geo licenses will be indefinitely required to use In-Region Routing:https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-multi-geo?view=o365-worldwide#licensing https://learn.microsoft.com/en-us/microsoft-365/enterprise/microsoft-365-multi-geo?view=o365-worldwide#getting-started  Review the documentation for configuring the feature: Configure Multi-Geo In-Region Routing (In Preview) - Microsoft 365 Multi-GeoEnterprise | Learn  Microsoft Learn" We value your feedback and want to hear from you if you …

  5. · first version seen

Learn more

Links from the notice and their documentation checks

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

Not confirmed here

What this page cannot tell you
  • Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
  • 2 linked pages have not been read yet.
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 27 Oct 16:49 UTC · 271 of 272 readable · 269 fully read · documentation 469/469 current

No accounts or analytics; your preferences stay in your browser. Information, not advice. ChangeIntel is an independent tool and is not affiliated with or endorsed by Microsoft, Apple, Google, Broadcom (VMware), Jamf, Oracle, Mozilla, or any other vendor it covers. Product names are trademarks of their owners. Built by Evotec.