Conflict Message Error when trying to Open a Meeting Invite

There is a bug that causes the conflict issue with Outlook Desktop. Until the fix is available and if you run into the conflict error, update that meeting in OWA, New Outlook, or Teams. This is one of our top priority fixes upcoming. Here is the Known Issue tracking the status, Outlook shows conflict errors when updating or cancelling meetings - Microsoft Support.

I had this happen for a meeting where a conflict manager would pop up. I apparently clicked the wrong option, so I now have over 500 instances of the meeting in my calendar. I went through and deleted some, but the meeting invitees got the cancellation for each instance I deleted. I am worried when it comes time for this meeting my Outlook will crash. I also had a previous meeting invite keep popping up as a meeting reminder after having a conflict error (weeks after the meeting happened and following me repeatedly dismissing the notification). If that happens for all 500+ instances of this meeting....

Is there any way to delete all of these meetings at once without sending notifications to attendees?

Michelle,

I asked my peers that focus on Outlook Calendar for guidance and there is probably not a one option solution to address this scenario. If you have the bandwidth, it might be best to have your tenant admin open a support ticket from the Admin Portal. I would probably avoid making updates to this series in Outlook Desktop and rather make them in OWA or Teams or New Outlook. The Outlook Team is still investigating the calendar conflict issue for a fix. I don't have an ETA yet.

The kinds of questions I was asked about that would likely need a support case to investigate further:

Is this user the organizer?

Is it a recurring meeting with no end date?

How many exceptions?

Were the cancellations sent because they were each exception to a recurring series?

Is a device syncing with the Calendar?

Is this personal calendar or EXO calendar?

We would want to get calendar logs and investigate the issue before suggesting a solution.

Hi Padma,

I had the same issue as you, but found that if you attempt to resize the "white space" (using the mouse to bring up the arrow keys) the whole conflict becomes visible once more and you can click the "Keep All" or "Keep This" option once more to attempt to resolve the conflict. Thanks