We are having some major issues with OMEv2. When using the "Do Not Forward" template with a transport rule, our partner company (also an Office 365 tenant) can open the encrypted emails. However, we do not want to limit their ability to print/save. So we've tried using the "Encrypt" (called "encrypt-only" here) template, and those users cannot open the email in Outlook at all. It gives a popup error reading "The application received an unexpected response from the Rights Management server due to a misconfiguration or a server error."
Another external Office 365 user couldn't open an email in the Office 365 web client using Internet Explorer, they got an error "The message you tried to open is protected with Information Rights Management and can only be opened using Outlook. Download a free trial of Microsoft Outlook."
This is ridiculous. We are a healthcare agency and we rely heavily on encrypted emails actually working...