How can I generate a new RefreshToken once Old one get Expired?
You can use the same ringcentral token API to get new reresh_token.
When you are going to generate a new access_token using existing refresh_token, you will automatically get a new refresh_token generated along with new access_token
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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