Can't update the names of event attendees using the Microsoft Graph API - microsoft-graph-api

Question

The following has been tried using the Microsoft Graph API Graph Explorer to eliminate any third-party causes. There is an existing event in an Outlook calendar:
{
"#odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('WWWW')/calendars('XXXX')/events/$entity",
"#odata.etag": "W/\"wIqdPsepnEOtI+GbtqRT1gAAElvUsQ==\"",
"id": "YYYY",
"createdDateTime": "2020-06-18T05:19:22.5766648Z",
"lastModifiedDateTime": "2020-06-18T17:17:23.3143899Z",
"changeKey": "wIqdPsepnEOtI+GbtqRT1gAAElvUsQ==",
"categories": [],
"originalStartTimeZone": "UTC",
"originalEndTimeZone": "UTC",
"iCalUId": "ZZZZ",
"reminderMinutesBeforeStart": 15,
"isReminderOn": false,
"hasAttachments": false,
"subject": "Review proposal",
"bodyPreview": "",
"importance": "normal",
"sensitivity": "normal",
"isAllDay": false,
"isCancelled": false,
"isOrganizer": true,
"responseRequested": true,
"seriesMasterId": null,
"showAs": "busy",
"type": "singleInstance",
"webLink": "https://outlook.office365.com/owa/?itemid=YYY&exvsurl=1&path=/calendar/item",
"onlineMeetingUrl": null,
"isOnlineMeeting": false,
"onlineMeetingProvider": "unknown",
"allowNewTimeProposals": true,
"recurrence": null,
"onlineMeeting": null,
"responseStatus": {
"response": "organizer",
"time": "0001-01-01T00:00:00Z"
},
"body": {
"contentType": "text",
"content": ""
},
"start": {
"dateTime": "2020-06-26T14:30:00.0000000",
"timeZone": "UTC"
},
"end": {
"dateTime": "2020-06-26T15:00:00.0000000",
"timeZone": "UTC"
},
"location": {
"displayName": "",
"locationType": "default",
"uniqueIdType": "unknown",
"address": {},
"coordinates": {}
},
"locations": [],
"attendees": [
{
"type": "required",
"status": {
"response": "none",
"time": "0001-01-01T00:00:00Z"
},
"emailAddress": {
"name": "attendee#example.com",
"address": "attendee#example.com"
}
},
{
"type": "required",
"status": {
"response": "none",
"time": "0001-01-01T00:00:00Z"
},
"emailAddress": {
"name": "Bob Smith",
"address": "organizer#example.com"
}
}
],
"organizer": {
"emailAddress": {
"name": "Bob Smith",
"address": "organizer#example.com"
}
}
}
The attendee's name was not known at the time the event was created. attendee#example.com was given which produced an attendee whose name and email address were both attendee#example.com. Later, the attendee's name became known. A patch request is sent to the organizer's calendar through Microsoft Graph API to update the event with the goal of overwriting the attendee's name, but leaving the email address as is.
{
"#odata.type": "#microsoft.graph.event",
"attendees": [{
"status": {
"response": "none",
"time": "0001-01-01T00:00:00Z"
},
"type": "required",
"emailAddress": {
"address": "attendee#example.com",
"name": "Julie Williams"
}
}, {
"status": {
"response": "none"
},
"type": "required",
"emailAddress": {
"address": "organizer#example.com",
"name": "Bob Smith"
}
}],
"createdDateTime": "2020-06-18T05:19:22.5766648Z",
"end": {
"dateTime": "2020-06-26T15:00:00",
"timeZone": "UTC"
},
"iCalUId": "ZZZZ",
"id": "YYYY",
"importance": "normal",
"isOrganizer": true,
"lastModifiedDateTime": "2020-06-18T05:19:23.7881324Z",
"location": {},
"organizer": {
"emailAddress": {
"address": "organizer#example.com",
"name": "Bob Smith"
}
},
"originalEndTimeZone": "Eastern Standard Time",
"originalStartTimeZone": "Eastern Standard Time",
"reminderMinutesBeforeStart": 15,
"responseRequested": true,
"responseStatus": {
"response": "organizer",
"time": "0001-01-01T00:00:00Z"
},
"sensitivity": "normal",
"showAs": "busy",
"start": {
"dateTime": "2020-06-26T14:30:00",
"timeZone": "UTC"
},
"subject": "Review proposal",
"type": "singleInstance",
"webLink": "https://outlook.office365.com/owa/?itemid=YYYY&exvsurl=1&path=/calendar/item"
}
The response shows that the attendee's name did not change.
{
"#odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('WWWW')/calendars('XXXX')/events/$entity",
"#odata.etag": "W/\"wIqdPsepnEOtI+GbtqRT1gAAElvUsQ==\"",
"id": "YYYY",
"createdDateTime": "2020-06-18T05:19:22.5766648Z",
"lastModifiedDateTime": "2020-06-18T17:17:23.3143899Z",
"changeKey": "wIqdPsepnEOtI+GbtqRT1gAAElvUsQ==",
"categories": [],
"originalStartTimeZone": "UTC",
"originalEndTimeZone": "UTC",
"iCalUId": "ZZZZ",
"reminderMinutesBeforeStart": 15,
"isReminderOn": false,
"hasAttachments": false,
"subject": "Review proposal",
"bodyPreview": "",
"importance": "normal",
"sensitivity": "normal",
"isAllDay": false,
"isCancelled": false,
"isOrganizer": true,
"responseRequested": true,
"seriesMasterId": null,
"showAs": "busy",
"type": "singleInstance",
"webLink": "https://outlook.office365.com/owa/?itemid=YYYY&exvsurl=1&path=/calendar/item",
"onlineMeetingUrl": null,
"isOnlineMeeting": false,
"onlineMeetingProvider": "unknown",
"allowNewTimeProposals": true,
"recurrence": null,
"onlineMeeting": null,
"responseStatus": {
"response": "organizer",
"time": "0001-01-01T00:00:00Z"
},
"body": {
"contentType": "text",
"content": ""
},
"start": {
"dateTime": "2020-06-26T14:30:00.0000000",
"timeZone": "UTC"
},
"end": {
"dateTime": "2020-06-26T15:00:00.0000000",
"timeZone": "UTC"
},
"location": {
"displayName": "",
"locationType": "default",
"uniqueIdType": "unknown",
"address": {},
"coordinates": {}
},
"locations": [],
"attendees": [
{
"type": "required",
"status": {
"response": "none",
"time": "0001-01-01T00:00:00Z"
},
"emailAddress": {
"name": "attendee#example.com",
"address": "attendee#example.com"
}
},
{
"type": "required",
"status": {
"response": "none",
"time": "0001-01-01T00:00:00Z"
},
"emailAddress": {
"name": "Bob Smith",
"address": "organizer#example.com"
}
}
],
"organizer": {
"emailAddress": {
"name": "Bob Smith",
"address": "organizer#example.com"
}
}
}
Should I expect the attendee's name to be updated? Is there another way to do it?