Up to 8 attachments (including images) can be used with a maximum of 1.0 MB each and 10.5 MB total.
Make sure you use correct format in Authorize url.
Also try putting following and check you are getting the code back in the url
It would have been better if you had provided your format here to get verified
Up to 10 attachments (including images) can be used with a maximum of 1.0 MB each and 10.5 MB total.
2 People are following this question.
Unable To Create SMS/MMS Message in Sandbox - errorCode:CMN-419
Pull call recordings....
I have used https://service.ringcentral.com/faxapi.asp. It raised upgrade your browser error. Couldn't send the fax viia API in C#
Call recording not showing up on API call but does on Production Website.
Ablity to set 'Forwarding Numbers' through API?