Hi KTWilliams,
That certainly sounds odd, secure invoicing rollout is only for AU products so that doesn't sound like the cause of your email functionality switched off.
If you haven’t already, it’s worth checking whether the email address you’re using has access to the file’s emailing permissions.
If that's not what's causing it, it would be best to reach out to our support team so they can investigate further from their side. You can create a ticket through My Account or connect with our live chat team through MOCA, our virtual assistant.
Regards,
Genreve