问题
The Microsoft Office365 REST API Sandbox offers sample requests to test supported REST API methods: https://oauthplay.azurewebsites.net/
However, all of the POST requests seem to fail, both when using
- the sandbox account
- your own account
for example, these request fail:
- open extensions: create a message with an open extension
- extended properties: create a message with an extended property
This holds for both API versions V2.0 and beta.
Why is this or what is going wrong in the Sandbox?
access, refresh and identity tokens are there and nothing is changed in the sample requests...
来源：https://stackoverflow.com/questions/49433163/extendedproperties-sample-request-in-rest-api-sandbox-fails