Error in PATCH onlineMeeting

Describe the bug

Hello,
I have integrated microsoft graph sdk to programmatically manage onlineMeetings. Since a couple of days I am getting errors in updating onlineMeetings (PATCH methods) even with this simple request:

PATCH https://graph.microsoft.com/v1.0/users/<owners_uid>/onlineMeetings/
{
"@odata.type": "#microsoft.graph.onlineMeeting",
"allowAttendeeToEnableCamera": true
}
response:
{
"error": {
"code": "InvalidArgument",
"message": "One or more properties do not support updating. Please refer to Microsoft Graph documentation for more information.",
"innerError": {
"date": "2026-05-11T09:52:54",
"request-id": "c33e69dd-de32-4030-a393-d6cd63a449ea",
"client-request-id": "c33e69dd-de32-4030-a393-d6cd63a449ea"
}
}
}

as a workaround I have used object.getBackingStore().clear(); just after its creation before passing it to the patch. This will delete the parameter "@odata.type": "#microsoft.graph.onlineMeeting" making it work again.

EDIT 2026-05-11 08:07:00: at the moment issue seems to have been fixed.

Expected behavior

PATCH https://graph.microsoft.com/v1.0/users/<owners_uid>/onlineMeetings/
{
"@odata.type": "#microsoft.graph.onlineMeeting",
"allowAttendeeToEnableCamera": true
}
returns 200 with updated onlineMeeting

How to reproduce

try to patch an existing meeting using the java sdk for example setting the parameter allowAttendeeToEnableCamera

sdk under the hood will automatically add
"@odata.type": "#microsoft.graph.onlineMeeting"
to the http patch

it used to work in the past, but since a couple of days it returns:
"error": {
"code": "InvalidArgument",
"message": "One or more properties do not support updating. Please refer to Microsoft Graph documentation for more information.",

SDK Version

6.64.0

Latest version known to work for scenario above?

No response

Known Workarounds

as a workaround I have used object.getBackingStore().clear(); just after its creation before passing it to the patch. This will delete the parameter "@odata.type": "#microsoft.graph.onlineMeeting" making it work again.

Debug output

</details>


### Configuration

_No response_

### Other information

_No response_

首先，使用 Java SDK 6.64.0 重现针对 onlineMeetings endpoint 的 PATCH 请求，使用 allowAttendeeToEnableCamera，并观察是否发送了 @odata.type。将该请求与文档中预期的 200 响应以及 getBackingStore().clear() workaround 进行比较；当 PATCH 成功且无需手动清除 backing store 时，即表示完成。