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

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

A new Microsoft-issued software patch for Outlook (Classic) on Windows 11 inadvertently broke encrypted email support - ...

When sending important information over email, such as financial statements, health records, or legal documents, it’s ...

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

In today’s digital landscape, email encryption has become a critical component of safeguarding sensitive information and maintaining secure communication channels. Microsoft 365 offers a comprehensive ...

You may see this error because the Microsoft 365 encryption service cannot verify your identity or check if you have permission to view the message. This is not ...