Microsoft graph - Update event request set isOnlineMeeting to false then true

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Microsoft graph - Update event request set isOnlineMeeting to false then true

Lang Nguyen 5

On an event that has isOnlineMeeting set to true, a PATCH request with the bellow to update an existing event

{"Subject":"Test Online Event 2025 a","Body":{"ContentType":"html","Content":"test note note"},"reminderMinutesBeforeStart":60,"isOnlineMeeting":true,"onlineMeetingProvider":"teamsForBusiness","responseRequested":true}

submitted to API Endpoint - graph.microsoft.com/v1.0/users/[12345]/events/[67890], it would changed the flag isOnlineMeeting to "false". Basically, it disconnects the Event from the original OnlineMeeting ties to it. If I submit the same request again, it will set the isOnlineMeeting flag to "true" and add a new Online Meeting back. Next submit will be false then true. It seems like every other submits set to false an other will be true.

Any thought on how this pattern is happening? and how can I update the event subject and other settings without messing the assigned OnlineMeeting up?

Note: If I take the flag isOnlineMeeting out of the request, it would set isOnlineMeeting to false and stay as false on all submits.

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Answer 1

Rajat Vashistha-MSFT 1,155 Microsoft External Staff

Hi Lang Nguyen,

Thanks for reaching out to Microsoft!

The issue you're experiencing is related to the Body property in the request body. Before updating the body of an event that has been set up as an online meeting, it is important to first retrieve the Body property, make the necessary changes to the content, and ensure that the meeting blob for the online meeting is preserved.

Removing the meeting blob inadvertently would disable the online meeting functionality. Please note that this behavior is intentional and expected within Outlook. User's image We recommend preserving the meeting blob for the online meeting before making changes and observing if the behavior improves.

You can refer to the following documentation for more details: Update event

Hope this helps.

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Lang Nguyen 5 Reputation points

2025-03-13T19:45:30.89+00:00

I was reading the Update Event document and it is a bit different.
In the request body, supply only the values for properties to update. Existing properties that aren't included in the request body maintain their previous values or are recalculated based on changes to other property values.

I included the body with the update it seems to retain the OnlineMeeting now. Now I just need to figure out a way to edit the text in the body without messing up the meeting text.
Thanks.

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Microsoft graph - Update event request set isOnlineMeeting to false then true

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