There is a workaround, though.

If you have encounter You don't have sufficient permissions error for encrypted emails in Outlook or Microsoft 365, check ...

While you may not use it as much as you used to, email still has a valuable role in digital communications. Maybe you spend more time using text messages, direct messaging, or even FaceTime, so it’s ...

Microsoft is working to resolve a known issue that prevents some users from opening Excel email attachments in the new Outlook client.