Zoho CRM for Google Apps is available in the Google Apps Marketplace.
Google Apps users with the Super Administrator role can activate the Zoho CRM service for your organisation. To activate, follow the steps given below:

1. Log in to Google Apps with Super Administrator's privileges.
2. In the Google Apps Dashboard page, click Add more services.
3. In the Google Services page, under the Other Services section, click Shop the Marketplace.
4. In the Google Apps Marketplace, search for the Zoho CRM application.
5. In the Zoho CRM application page, click Add it Now and enter your Google Apps domain name.
6. In the Agree to terms of service page, review the Zoho CRM terms of service and click I agree. Continue.
7. In the Grant data access page, review the list of Google data APIs and click Grant data access.
8. In the Enable the app page, click Enable app now. The Zoho CRM application will be added to the dashboard and Google universal navigation.