Calendar Problems

Fix Outlook Showing Notifications for Other Users' Calendar Events

Maira Mehtab Sep 22, 2026 868 views

Question details

Users are receiving unexpected pop-ups and notifications for calendar events that belong to other employees.

Product: Microsoft Outlook and Teams
Device & OS: not provided
Scenario: Employees updated to the New Outlook and Teams, after which incorrect calendar alerts began appearing.
Observed behavior: The Outlook and Teams clients display alerts for shared calendar events or other users' schedules, overriding personal notification preferences.

Before you start

Before escalating the issue, note down specific examples of the incorrect notifications, including timestamps, affected users, and your exact Outlook client version to help IT support diagnose the problem quickly.

Solution 1Recommended

Submit a Microsoft 365 Admin Service Request

The most effective solution for post-update calendar notification defects is to have your IT administrator open an official support ticket with Microsoft.

Unexpected notifications for other users' calendar events are often caused by underlying software defects introduced in recent Teams or New Outlook updates, or by backend permission changes.

Since individual users cannot resolve server-side defects, escalating the issue via the Microsoft 365 Admin Center is required.

Gather necessary details

Collect a list of affected users, specific event examples (subject and time), current client versions for Outlook and Teams, timestamps of the unexpected notifications, and steps to reproduce.

Access the Admin Center

Ask your Microsoft 365 administrator to log in to the Microsoft 365 admin center using their administrator credentials.

Open a service request

Navigate to the Support section in the admin center, select 'New service request', and input the gathered details about the shared calendar notification defect.

Information for Administrators: Providing accurate timestamps and client version numbers greatly reduces the time required for Microsoft support to identify and deploy a bug fix for calendar issues.

Solution 2

Verify Shared Calendar Notification Settings

Check if the recent update inadvertently re-enabled alerts for shared calendars in your local Outlook client settings.

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Frequently Asked Questions

Why did I start receiving other users' calendar alerts after an update?

Updates to Microsoft Teams and the New Outlook can sometimes reset shared-calendar notification settings or introduce software defects that temporarily mix up permission parameters, causing you to see alerts for events you don't own.

Can I manually turn off these shared calendar notifications?

You can attempt to disable them locally by going to File > Options > Advanced (or Calendar) in Outlook and unchecking 'Show reminders for shared calendars'. However, if the issue stems from an update bug, your IT admin may need to intervene.

How do I find my Outlook client version to report this issue?

Open your Outlook client, click on 'File' in the top ribbon, select 'Office Account' (or 'Help'), and check the 'About Outlook' section. This screen displays your exact version and build number, which is crucial for support tickets.

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