MC1326502 – Shared and delegate mailbox scheduling for events

Product:

Exchange, Microsoft 365 Apps, Teams

Platform:

Mac, Online, Windows Desktop, World tenant

Status:

Feature Rollout Status Not Supported

Change type:

New feature, User impact, Admin impact

Links:

561912

Details:

Summary:
Shared and delegate mailbox scheduling for events lets delegates organize events on behalf of leaders using shared or delegated mailboxes, sending invitations from trusted organizational identities. Rolling out worldwide June–July 2026, it improves event coordination and trust, requires no action, and respects existing Exchange permissions.

Details:
[What and Why:]
We're introducing shared and delegate mailbox scheduling for events, which allows executive assistants and delegates to organize events on behalf of leaders using shared or delegated mailboxes. This ensures invitations and updates are sent from recognized organizational mailboxes, improving trust, consistency, and overall event coordination.
This message is associated with Microsoft 365 Roadmap ID 561912.
[Rollout Schedule:]
Targeted Release (Worldwide): We will begin rolling out in early June 2026 and expect to complete by late June 2026.
General Availability (Worldwide): We will begin rolling out in early July 2026 and expect to complete by late July 2026.
[Impact on Your Organization:]
Who is affected: Event organizers, executive assistants, Chiefs of Staff, delegates, and admins managing events on behalf of leaders or teams.
Platforms/Services: Microsoft Teams, Exchange Online (delegate, shared, and group mailboxes)
What will happen:
Events can be created and managed using delegate, shared mailboxes.
Invitations, updates, and notifications are sent from the selected mailbox identity.
Delegates can manage scheduling and logistics on behalf of leaders or teams.
Event communications align with trusted organizational mailboxes, improving credibility and recipient trust.
The feature is enabled by default and respects existing Exchange permissions.
[Action Required / Recommendations:]
No action is required.
Review delegate and shared mailbox permissions to ensure appropriate access.
Communicate this change to executive support staff and helpdesk teams.
[Compliance Considerations:]
Compliance AreaExplanation
Does the change alter how existing customer data is processed, stored, or accessed?Event-related communications (invites, updates, notifications) are sent using delegate, shared mailbox identities instead of individual user mailboxes.
Does the change provide a new way of communicating between users?Events and notifications are now communicated from organizational mailboxes, changing the sender identity model for events.
Does the change include an admin control?Access is governed by existing Exchange delegate and shared mailbox permissions; no new policy is required.

Change Category:
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Scope:
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Release Phase:

Created:
2026-05-30

updated:
2026-05-30

Task Type

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Docu to Check

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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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summary for non-techies**

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Direct effects for Operations**

Change in Sender Identity for Event Communications
Event invitations and updates will be sent from shared or delegated mailboxes instead of individual user mailboxes, potentially causing confusion among recipients who may not recognize the new sender identity.
   - roles: Event Organizers, Executive Assistants
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=561912

Increased Risk of Miscommunication
With the new system, if permissions are not properly reviewed, delegates may inadvertently send invitations or updates to incorrect recipients, leading to scheduling conflicts or missed events.
   - roles: Chiefs of Staff, Admins
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=561912

Configutation Options**

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Data Protection**

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explanation for non-techies**

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