Changing from PayPal to Authorize.net

Hi! We just switched form PayPal to Authorize.net.....(adding one and deleting the other). When we send out an invoice, the link in the e-mail goes to the Zoho Books page, but there is no place to click to actually pay the invoice. Before with PayPal, there was a link they could click, and now it is just an online invoice looking at the customer, but no way to pay.

Does it take some time for the authorize.net integration to get set up in Zoho Books to create an online payment link?

Thanks!