If you face an integration service error while trying to connect your WhatsApp Business Account with Zoho Books, it could be because the account was previously linked to a different Business Service Provider (BSP). Also, using a different currency with that BSP can cause conflicts when connecting your business account to the Zoho BSP.
To resolve this issue, you must create a new WhatsApp Business Account to ensure proper integration with Zoho Books.
Books
Online accounting software
for small businesses.