Forum Discussion
SharePoint Webhook can't validate endpoint
I have Web API on our local IIS which is open to publich network (anonymous) with HTTPS and Certificate. I can connect (GET/POST) using Postman and browsers but when I try to attach the webhook I get "Failed to validate the notification URL". I googled all day withouth any luck.
I noticed that the webservice must respond in 5s when subscribing? If I try it in postman or browser the response is immediate.
Am I missing something?
4 Replies
In SP documentation, the variable name spelled, "validationToken", but in real SP sends it as "validationtoken", it may be an issue with your code implementations.
Thanks for your reply but did not work. I don't even get the request to the server.
- Have you checked your endpoint from external network? If possible post your endpoint here to test it from my side. Thanks.
