Microsoft has confirmed a known issue that prevents recipients from opening encrypted emails in classic Outlook.

Microsoft is looking into a newly identified issue in classic Outlook that prevents users from opening certain encrypted ...

The problem happens for users who encrypt the email using the settings under the email File dialog (File > Encrypt), ...

Ensure smooth email delivery by checking Outlook's status, restarting the app, and maintaining stable internet connectivity Make sure Outlook is working and check your internet connection if you're ...