Error when opening encrypted email in classic Outlook for Windows

Applies To
Outlook for Microsoft 365

Last Updated: July, 27, 2026

ISSUE

Users report receiving an error when opening an encrypted email: "Sorry, we’re having trouble opening this item. This could be temporary, but if you see it again you might want to restart Outlook. Cannot read the item.”

This issue is currently impacting users on Outlook build 2606 (16.0.20131.20126) and above when accessing externally encrypted email messages.

The screenshot shows an example of the encrypted email error received in classic Outlook.

STATUS: INVESTIGATING

The Outlook Team is investigating this issue. We will update this topic when we have more information.

WORKAROUND

To work around the issue, users can open the email using new Outlook or Outlook Web App (OWA).

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See Also

Fixes or workarounds for recent issues in classic Outlook for Windows