How to Fix Duplicate Meeting Room Invitations in Exchange Online
Question details
Users receive multiple accepted messages or duplicate response requests from meeting rooms in Exchange Online.
- Product
- Exchange Online
- Device & OS
- not provided
- Scenario
- Booking a meeting room or acting as a booking delegate for calendar events.
- Observed behavior
- Exchange Online meeting rooms send multiple meeting invitations or duplicate response emails due to a recent service update code regression.
Verify if you are acting as a booking delegate adding a room to a meeting invite, and check your Microsoft 365 Service Health Dashboard for active Exchange Online incidents.
Apply the Microsoft Official Workaround for Delegate Scenarios
Use this solution to review Microsoft's specific documentation and temporary workarounds for the known Exchange Online duplication bug.
This duplicate email behavior is caused by a known code regression in Exchange Online. It primarily affects Outlook users who are booking delegates and add a room to a meeting invite. Since this is a server-side issue, client-side troubleshooting (like reinstalling Outlook) will not resolve it.
Determine if the duplicate emails occur specifically when a booking delegate adds a room to a meeting invitation. This confirms you are experiencing the known Exchange Online regression.
Navigate to the official Microsoft support portal and search for the incident regarding delegates adding rooms to meeting invites to read the latest status updates.
Follow any temporary mitigation steps provided in the Microsoft Service Health dashboard for your tenant until Microsoft releases a permanent server-side patch.
Manage Meeting Notes and Agendas Easily with WPS Office
While server-side issues like Exchange duplicate invitations require Microsoft backend updates, you can keep your meeting preparations running smoothly with WPS Office. As a lightweight and free alternative, it provides all the tools you need to draft meeting minutes and schedules seamlessly.
- 1. Download the software: Visit the official WPS Office website and click on the 'Download WPS Office Free' button.
- 2. Install the suite: Run the downloaded installer and follow the on-screen prompts to set up the software on your computer.
- 3. Create meeting documents: Open WPS Writer or Spreadsheet to easily draft and share your meeting agendas using built-in, professional templates.
Frequently Asked Questions
Why is my Exchange meeting room sending duplicate emails?
This is often caused by a known code regression in a recent Exchange Online service update, specifically affecting scenarios where booking delegates add a room to an invitation.
Can I fix this duplicate invitation issue by reinstalling my email client?
No. Because this is a server-side bug within Exchange Online, reinstalling or repairing your local email client will not resolve the duplicate email issue.
Do I need administrator rights to resolve this issue?
Yes, typically checking the official Microsoft 365 Service Health Dashboard or applying tenant-wide Exchange workarounds requires administrator credentials.
