Error create subscription

Question

I get an error message but it's not clear, can you tell me what I need to fix for my request?

Answer 1

Hi @Lê Văn Hào

According to your screenshot, there is nothing wrong with the way you requested it, the problem should be with the endpoint you subscribed to, and your notification endpoint must be able to validate the request accordingly and return the authentication token in plain text.

If your subscription endpoint is not validated correctly, 400 error requests will occur.

Please refer to this link for more details:

https://learn.microsoft.com/en-us/graph/change-notifications-overview#notification-endpoint-validation

Hope this helps.

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