Random error adding a webhook subscription to a SharePoint list through Graph API

Question

I am attempting to add a webhook subscription to a SharePoint List through the Graph API, but I receive an error that doesn't actually even match my data.

Post URL: https://graph.microsoft.com/v1.0/sites/{siteId}/lists/{listId}/subscriptions

Im adding an authorization header with a token using an Azure Entra Id App Registration client/secret.
The token works fine for all other graph API calls.

Post Body:
{ 'changeType': 'updated', '
resource': 'sites/MYSITE.sharepoint.com,5bcc59bc-cdf7-4aab-84a9-97d2cb0bddd0,7e2272e9-1a2c-4ec5-aae2-57b4c95dfe7f/lists/52dda4c2-dbaf-447c-aff4-4390df79c772/',
'notificationUrl': 'https://MY-URL/api/webhook',
'expirationDateTime': '2024-02-06T20:27:36.6599538-05:00' }

Response:
{"error":{"code":"invalidRequest","message":"One of the provided arguments is not acceptable.","innerError":{"code":"badArgument","date":"2024-02-02T01:35:20","request-id":"aef43efc-902b-4217-97ec-b9e0770b8f0b","client-request-id":"aef43efc-902b-4217-97ec-b9e0770b8f0b"}}}

As you can see the "Bad Date" doesn't even match the date I supplied. Its the date of the submission.

Answer 1

Hi @Derek Barka , Thanks for reaching out.

I think there is the issue with the format of the expirationDateTime in the subscription object (Body of the request)

This property takes dateTime as UTC time only. Below is the sample subscription object

{
   "changeType": "created",
   "notificationUrl": "https://webhook.azurewebsites.net/api/send/myNotifyClient",
   "resource": "me/mailFolders('Inbox')/messages",
   "expirationDateTime":"2016-11-20T18:23:45.9356913Z",
   "clientState": "secretClientValue",
   "latestSupportedTlsVersion": "v1_2"
}

Try changing the expirationDateTime in your example from '2024-02-06T20:27:36.6599538-05:00' to '2024-02-06T20:27:36.9356913Z'

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