I get a CMN-405 error. Any ideas why this may be happening?
It is clear that you have not authenticate your app to access the platform.
Read these documentation to learn how to create and app, authenticate and call the APIs
https://developers.ringcentral.com/guide/applications https://developers.ringcentral.com/guide/authentication https://developers.ringcentral.com/guide/messaging/fax/sending-faxes
Ask in a different thread if and when you have a particular question.
@Phong Vu It appears I have authorized it. However, I receive what you will see below when attempting to use the callback URI: https://app.workato.com/oauth/callback
"Workato OAuth authorization failed Unknown/invalid shared account with id ="
What is your app client id? How do you call the /authorize to authenticate?
Provide some code snippet w/o sensitive information.
Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.
Download RingCentral Phone for Desktop:
Tip: switch to the "sandbox mode" before logging in the app:
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Error Code WAP-100 "Authentication cookie is not presented in request!",Error Code: WAP-100 "Authentication cookie is not presented in request!"
User needs to have [OrganizeConference] permission for requested resource.
Sandbox API - service temporarily not available
sandbox fax send: 400 "Bad Request"