Message Center
Updated October 30, 2025: We have updated the timeline. Thank you for your patience.
Introduction
We’re introducing 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 Exchange Online, a new capability that helps organizations meet regional data residency requirements by allowing inbound email routing to be aligned with user locations. With IRR, admins can configure accepted domains to route messages directly to a designated geo-region, ensuring that email data is processed and stored entirely within the recipient’s region—even if it differs from the tenant’s primary location. This helps organizations meet compliance requirements without compromising email delivery performance.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 AugustOctober 2025 and expect to complete by end of AugustOctober 2025.
General Availability (Worldwide): We expect to begin rolling out in early October 2025 (previously early December) and expect to complete by late OctoberDecember 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. 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 (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:
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:
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 inbound email routing to be aligned with user locations. With IRR, admins can configure accepted domains to route messages directly to a designated geo-region, ensuring that email data is processed and stored entirely within the recipient’s region—even if it differs from the tenant’s primary location. This helps organizations meet compliance requirements without compromising email delivery performance.
This message is associated with Microsoft 365 Roadmap ID 410245.
When this will happen:
Public Preview: We will begin rolling out in early August 2025 and expect to complete by end of August 2025.
General Availability (Worldwide): We expect to begin rolling out in early October 2025 and expect to complete by late October 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. 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 (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:
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: