Zoho Commerce Internal Authentication Setup

Log in to iPaaS.com (staging or production).

On the Dashboard, select your company where your Zoho Commerce Integration exists.

Select View as Integrator under the company name at the top of the screen.

Navigate to Integration Management > Integrations.

Find your Zoho Commerce Integration and click the Edit icon.

Scroll to Versions and click the Edit icon. click on version edit icon
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Set the OAuth URL Template to:

https://accounts.zoho.com/oauth/v2/auth?scope=ZohoCRM.modules.ALL,ZohoCRM.settings.ALL,ZohoCommerce.inventoryadjustments.CREATE,ZohoCommerce.items.ALL,ZohoCommerce.salesorders.READ,ZohoCommerce.salesorders.CREATE,ZohoCommerce.salesorders.UPDATE,ZohoCommerce.settings.READ,ZohoCommerce.webhooks.READ,ZohoCommerce.webhooks.CREATE,ZohoCommerce.webhooks.ALL&client_id={Client_Id}&response_type=code&redirect_uri={SystemTypeVersion:RedirectUrl}&access_type=offline&state={iPaaSState}

Scroll to the bottom of the dialog box and click Add.

Add the following Custom Field:

Click Save.

On the Edit Integration screen, Set Authorization Type to OAuth Initiated within iPaaS.
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Click Apply, and iPaaS.com saves the integration.

On the Dashboard, select your company where your Zoho Commerce Integration exists.

Navigate to Subscription Management > Subscriptions, and click the Edit button for the Zoho Commerce subscription.

On the Subscription Settings screen, click the Authenticate icon.
The Zoho Commerce Authentication portal opens.

Select the checkbox to allow iPaaS.com access and then click Accept.

Click Close Page.