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Fix Microsoft Planner Comments Not Emailing All Assigned Users

Maira Mehtab Sep 27, 2026 869 views

Question details

Users are experiencing issues where Microsoft Planner comment notifications only reach a subset of assignees or go directly to a group mailbox instead of emailing everyone assigned to the task.

Product: Microsoft Planner
Device & OS: not provided
Scenario: Tracking task updates and receiving comment notifications in a Microsoft Planner workspace.
Observed behavior: Comment emails do not reach every assigned user; they frequently skip specific assignees or only deliver to the general group mailbox.

Before you start

Verify your Microsoft 365 account permissions to determine if you have administrator rights, as investigating this tenant-wide issue requires admin access to service logs.

Solution 1Recommended

Contact Microsoft 365 Support for Service Log Investigation

Because Planner comment email failures often affect multiple plans and stem from server-side issues, a Microsoft 365 administrator must contact support to investigate the backend logs.

Microsoft Planner's built-in notification system does not inherently guarantee an email delivery to every assignee for every single comment update. However, if notifications are consistently failing or only routing to the group mailbox unexpectedly across all plans, it indicates a service-side malfunction that requires official support intervention.

Identify Administrator Roles

Check if you have Microsoft 365 administrator privileges. If you are a standard user, you must ask your IT department or Microsoft 365 administrator to open the support request.

Access the Admin Center

Have the administrator log in to the Microsoft 365 admin center at admin.microsoft.com.

Open a Support Request

Navigate to the 'Support' or 'Help & support' section, describe the Planner notification issue affecting your plans, and specifically request a service log investigation.

Important Design Limitation: Even when functioning correctly, Planner notifications may not email every assignee for every comment update by design. For guaranteed notifications, consider setting up custom Power Automate flows.

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Frequently Asked Questions

Why do Planner comments only go to the group mailbox?

By default, Microsoft Planner sends task comments to the plan's associated Microsoft 365 Group mailbox. For users to receive these messages in their personal inboxes, they typically need to follow the group in Outlook or adjust their personal group notification settings.

Can I force Microsoft Planner to email every assignee?

Planner's default notification system does not guarantee an email to every assignee for every single comment update. If you need guaranteed individual emails, you can use Microsoft Power Automate to create a custom workflow that triggers an email whenever a task is commented on.

Who can contact Microsoft 365 support for Planner issues?

Only users with active administrator privileges in your organization's Microsoft 365 tenant can access the admin center and submit official support tickets to investigate backend service logs.

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