We’ve released API version 2.4.0!

This is a breaking change from version 2.3.0

Changes

We fixed an issue where Microsoft authentication errors were returned as plain text. Now they return as a JSON object.

{
 "message": "You've entered invalid credentials",
 "type": "auth_error",
 "error": "Wrong username or password for https://outlook.com/EWS/Exchange.asmx"
}

Take a look at our documentation.