Not able to create an online meeting for a group using Graph API

Question

I am using Graph API SDK to create group events that are configured as online meetings.
However, the code that was working earlier has stopped working. The same issue occurs when tried through Graph explorer. Below is the request.

{
"subject": "Test",
"body": {
"contentType": "HTML",
"content": "Test meeting"
},
"start": {
"dateTime": "2021-03-08T02:30:00",
"timeZone": "India Standard Time"
},
"end": {
"dateTime": "2021-03-08T03:00:00",
"timeZone": "India Standard Time"
},
"location": {
"displayName": "Harry's Bar"
},
"attendees": [
{
"emailAddress": {
"address": "xxx.xxxxx@xxxxxxxxxxxxx .xxx",
"name": "xxx xxxx"
},
"type": "required"
}
],
"isOnlineMeeting": true,
"onlineMeetingProvider": "teamsForBusiness"
}

Answer 1

I'm facing something similar to this. A POST request to /beta/me/events or /v1.0/me/events with almost the same params as the OP.

{
:subject => "subject",
:body => {
:content => "some content"
},
:start => {
dateTime => some start time,
:timeZone => some time zone
},
:end => {
:dateTime => some end time,
:timeZone => same timezone as above
},
:allowNewTimeProposals => false,
:isOnlineMeeting => true,
:onlineMeetingProvider => "teamsForBusiness"
}

Most of the time, it works fine. But sporadically, it returns:

{
isOnlineMeeting => false,
onlineMeetingProvider => "unknown",
onlineMeeting => nil
}