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

Your Outlook emails might be moved to the Junk folder. Check this. If you find your emails there, move them to the Inbox. Right-click on the email and select Move to > Inbox. You might have ...

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

Microsoft Outlook’s Quick Steps allow you to bundle several actions into a single click or keyboard shortcut that you trigger ...