Forum Discussion

Brass Contributor

Jun 16, 2022

Question about Graph API - changes notification

Hello, I'm writing a java project to create subscription to online meeting resources. I followed this instruction https://docs.microsoft.com/en-us/graph/webhooks?view=graph-rest-1.0 to construct a n...

Brass Contributor

Jun 16, 2022

Prasad_Das-MSFT that project is written in nodejs, is there any Java example?
In addition, can't I just use Graph API to achieve it?

Prasad_Das-MSFT

Microsoft

Jun 16, 2022

ChenguangHe - There is no Java sample available for it. However, this thread discusses about similar issue. Please have a look at once which explains:
validationToken will only send to the webhook at the time of Subscription creation, after that Microsoft start sending the change notifications and there won't be any validationToken send with the change notification. This is done just to ensure that the Notification endpoint is valid/active.
Set up notifications for changes in resource data - Microsoft Graph | Microsoft Docs

ChenguangHe
Brass Contributor
Jun 16, 2022
Hi Prasad_Das-MSFT, I used the given sample and still have some issues. When I create request of change notification, how can I get clientState, encryptionCertificate and encryptionCertificateId?
- Prasad_Das-MSFT
  Microsoft
  Jun 20, 2022
  ChenguangHe - Please refer this doc: changeNotification resource type - Microsoft Graph v1.0 | Microsoft Docs
  - ChenguangHe
    Brass Contributor
    Jun 22, 2022
    Problem solved. Thanks.