Encrypted emails in Microsoft’s older email client—called “classic Outlook” as opposed to “new Outlook”—have once again encountered problems. The company confirms on this support page that users of ...

Microsoft is investigating a known issue that triggers Outlook errors when opening encrypted emails sent from other organizations. According to a recently published support document, this issue ...

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 ...

There is no fix available, but you can always revert to an older version.

Microsoft is investigating a bug preventing recipients from opening encrypted emails in classic Outlook after a recent update. This known issue affects users who try to open messages encrypted with ...