Once you obtain the client id, client secret using the above KB, Update that client id and client secret in the agent edit page(Only Admins) or zoho page(Only Agents) As shown below

ADMINS - (If you have admin access)

Only Admins can edit any agents client id or client secret. Come to agent edit page.
 
link: https://tepro.txcontact.com/txsmartq/agents/list





Once Client Id and Client secret is updated you can get refresh token for that particular agent. Come to Zoho Integration page and click on Get Refresh token button to get the refresh token for that agent

https://tepro.txcontact.com/zoho/usermap


Admins will see something like this







If you have only Agents login Access you will see this page 

Update Client Id and Client Secret here. Agents can only update their Client Id and Client Secret
(Agents can directly login to SmartQ Page with their credentials)







You will see one of the 3 options or buttons

 * Update Refresh Token (Refresh Token was already found, if the refresh token is present and you generate one more code, the current refresh token will no longer be valid. SO DON'T GENERATE ONE MORE CODE)
 * Missing Client Id or Client Secret (Client ID or Client Secret is missing in the agent edit page. Fill it there first)
 * Get Refresh Token (Client ID and Client Secret was found now we can generate the new code)

Once clicked on the button Get Refresh Token button, it will redirect you to Zoho page to obtain the refresh token

Login to your zoho account there and click on check box and click on accept


It will redirect you to one more page there you should find sucess message like this. 

{"status": "success", "message": "Successfully updated the refresh token"}




If you find error message like invalid_code. then you have mentioned the wrong client_id client_secret in the agent edit page. or 

{"status": "error", "message": "ZOHO ERROR: invalid_code"}

If you get some other error like this, then the provided redirect url is incorrect.
it should be something like this "https://tepro.txcontact.com/zoho/getZohoCode"




You can verify the redirect URL here in the zoho site 
link: https://api-console.zoho.com/