check before: 2026-05-01
Product:
Exchange, Microsoft 365 admin center
Platform:
Online, Windows Desktop, World tenant
Status:
In development
Change type:
Admin impact, New feature, Updated message, User impact
Links:
Details:
Summary:
Dynamic distribution groups (DDGs) in Exchange Online will populate membership immediately upon creation or modification if the filter returns 5,000 or fewer members, eliminating up to a 2-hour wait. For larger groups, membership populates within 2 hours with a warning shown. Rollout begins late May 2026.
Details:
Updated April 29, 2026: We have updated the content. Thank you for your patience.
[Introduction]
We're updating dynamic distribution groups (DDGs) in Exchange Online so group membership is available sooner after a group is created or its filter is changed. For DDGs whose filter returns 5,000 members or fewer, membership will be populated during the creation or modification operation, eliminating the previous wait of up to two hours.
This message is associated with Microsoft 365 Roadmap ID 560550.
[When this will happen]
General Availability (Worldwide): We will begin rolling out in late May 2026 and expect rollout to complete by early June 2026.
Change Category:
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Scope:
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Release Phase:
General Availability
Created:
2026-04-29
updated:
2026-04-30
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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Pictures
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summary for non-techies**
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Direct effects for Operations**
Dynamic Distribution Groups Membership Population
If the change is implemented without preparation, administrators may face confusion and miscommunication regarding the membership population timing, leading to potential delays in user access to group resources.
- roles: Exchange Online Administrators, Helpdesk Staff
- references: https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/create-manage-dynamic-distribution-groups, https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/troubleshoot-ddg-membership-issues
User Access to Resources
Users may experience delays in receiving access to group resources if the membership population is not communicated effectively, especially for groups exceeding 5,000 members.
- roles: End Users, Exchange Online Administrators
- references: https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/create-manage-dynamic-distribution-groups, https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=560550
Configutation Options**
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explanation for non-techies**
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change history
| Date | Property | old | new |
| 2026-04-30 | MC Last Updated | 04/29/2026 00:13:21 | 2026-04-29T20:46:35Z |
| 2026-04-30 | MC Messages | [Introduction]
We're updating dynamic distribution groups (DDGs) in Exchange Online so group membership is available sooner after a group is created or its filter is changed. For DDGs whose filter returns 5,000 members or fewer, membership will be populated during the creation or modification operation, eliminating the previous wait of up to two hours. This message is associated with Microsoft 365 Roadmap ID 560550. [When this will happen] General Availability (Worldwide): We will begin rolling out in late May 2026 and expect rollout to complete by early June 2026. | Updated April 29, 2026: We have updated the content. Thank you for your patience.
[Introduction] We're updating dynamic distribution groups (DDGs) in Exchange Online so group membership is available sooner after a group is created or its filter is changed. For DDGs whose filter returns 5,000 members or fewer, membership will be populated during the creation or modification operation, eliminating the previous wait of up to two hours. This message is associated with Microsoft 365 Roadmap ID 560550. [When this will happen] General Availability (Worldwide): We will begin rolling out in late May 2026 and expect rollout to complete by early June 2026. |
| 2026-04-30 | MC MessageTagNames | New feature, User impact, Admin impact | Updated message, New feature, User impact, Admin impact |
| 2026-04-30 | MC prepare | No action is required.
Update internal documentation or helpdesk guidance that references a 2-hour wait time for DDG membership population after creation or modification. Inform administrators that immediate membership availability will apply to DDGs whose filter returns 5,000 members or fewer after rollout. Learn more [documentation to be updated closer to rollout]: [to be updated] Create and manage dynamic distribution groups in Exchange Online | Recipients in Exchange Online | Exchange Online | Microsoft Learn [to be updated] Troubleshoot dynamic distribution group membership issues | Dynamic distribution groups | Recipients in Exchange Online | Exchange Online | Microsoft Learn [Compliance considerations] No compliance considerations identified. Review as appropriate for your organization. https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/create-manage-dynamic-distribution-groups https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/troubleshoot-ddg-membership-issues https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=560550 | No action is required.
Update internal documentation or helpdesk guidance that references a 2-hour wait time for DDG membership population after creation or modification. Inform administrators that immediate membership availability will apply to DDGs whose filter returns 5,000 members or fewer after rollout. Learn more: Create and manage dynamic distribution groups in Exchange Online | Recipients in Exchange Online | Exchange Online | Microsoft Learn Troubleshoot dynamic distribution group membership issues | Dynamic distribution groups | Recipients in Exchange Online | Exchange Online | Microsoft Learn [Compliance considerations] No compliance considerations identified. Review as appropriate for your organization. https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/create-manage-dynamic-distribution-groups https://learn.microsoft.com/exchange/recipients-in-exchange-online/manage-dynamic-distribution-groups/troubleshoot-ddg-membership-issues https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=560550 |
Last updated 2 weeks ago ago
