I see that custom SAML integration is available for letting customers access their portal in Subscriptions. That's nice, but a lot more complicated than it needs to be.

All that's required for secure customer portal access would be an API endpoint that would allow us to obtain a single-use URL for that one customer, e.g. https://subscriptions.zoho.com/portal/org/customer_id?token=WlkZmBtamlhYHd2Jz9xd3BgeCUl. That token could expire in a reasonable period of time (5 minutes?), and following that URL (perhaps by just dropping it into an iframe in our app) would allow the user to access their portal without any authentication whatsoever.

Just an idea; hopefully it shows up in a future release! :-)