Learn how to grant access to new Apex classes by navigating through the Setup menu and updating profile settings.

1. Navigate to Setup > Manage Users > Profiles .
2. Click the profile to whom you want to grant access to.
3. On the Profile page, click Apex Class Access .
4. Click Edit .
5. On the Apex Class Access page, click and add all Apex classes with the namespace "Zuora" from the Available Apex Classes section to the Enabled Apex Classes section.
6. Click Save .