Recurring calendar events are being resend everyday, how to avoid this ?

Question

Recurring calendar events are being resend everyday, how to avoid this ?

Victor E. Aquino 0

So we are having an issue where (Mostly) recurring calendar events invite are being resend to all the people invited, some of them are send everyday late at night, other are send randomly via a Microsoft exchange email on behalf of the user who created the calendar event.

We have investigate is not an specific user, a few are from email groups, online people have mentions issue with sync from iOS devices (Not really the case on this issue), others have mention use of old Outlook app, but most user have migrated to the new version.

Something we saw while looking deep on those email, is that the original email says that "Your meeting was found to be out of date and has been automatically updated" but for the user is just being show as a new calendar event.

Is happing a lot, we're try to find a solution to this issuer since is happing a lot, to multiple users.

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Answer 1

TiNo-T 4,215 Microsoft External Staff Moderator

Dear @Victor E. Aquino,

Thank you so much for contacting Microsoft Q&A Forum.

Based on your description, the issue you're facing with recurring calendar invites being resent automatically in Microsoft Exchange/Outlook environments which is a known and complex problem that can stem from multiple causes.

I have tried to research in all material document from Microsoft and found this article that mentioned about your problem. You can take a look in here: Attendees receive multiple meeting invitations - Exchange | Microsoft Learn

Also, I would like to know that it happened on Exchange Online environment or Exchange Server environment so that I can troubleshoot you further.

I look forward to your response.

Wish you a pleasant day!

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Victor E. Aquino 0 Reputation points

2025-08-07T20:31:21.37+00:00

Well the link is very useful, is not really our situation since it happened to user that does not use or own iOS devices, and the article is mostly related to that, and also for the user that makes changes to calendar events, and in this case is does not require a change for the meeting to be resented, their being send anyway, mostly recurring but some (very few) are individual/just once meeting.

To answer your question, we use Exchange Online environment.
TiNo-T 4,215 Reputation points Microsoft External Staff Moderator

2025-08-08T08:45:29.3233333+00:00

Dear @Victor E. Aquino,

Good day! Thank you so much for your update to Microsoft Q&A Forum.

Based on your new information, it sounds like an abnormal behavior happening with the recurring calendar recently. Also, I have tried to research more to find the solution for you. However, there is no official confirmation for it at the moment.

Due to the complexity of the issue and the limitations of support available through the Q&A forum, I kindly suggest that you submit a service request through the Microsoft 365 Admin Center for the most efficient help. This will allow our dedicated support engineers who have broader diagnostic tools and permissions to investigate and assist you more effectively.

I hope for your patience and understanding in this situation because I really want to help you as much as I can. However, I'm limited in my resources as a forum moderator, and I cannot access the internal databases to check it further. So, please kindly contact Microsoft Support team for proper assistance.

And if you found my answer and response were helpful in any way, it'd be great that you can mark it as an accepted answer. It could be a big help to others in our community who might run into the same thing and make our platform stronger every day.

Wish you a good day!
TiNo-T 4,215 Reputation points Microsoft External Staff Moderator

2025-08-11T06:45:39.1266667+00:00

Dear @Victor E. Aquino,

I would like to kindly follow up to ask whether the solution I provided has addressed your concern. If not, please feel free to share any additional details so that we can work together to resolve the issue effectively.

If the response was helpful, it’d be great if you could mark it as an accepted answer. This helps others in the community who may be facing similar challenges and it can build our platform stronger.

Thank you for your time and understanding!

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Recurring calendar events are being resend everyday, how to avoid this ?

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