Error when opening encrypted email in classic Outlook for Windows

Applies To
Outlook for Microsoft 365

Last Updated: August, 4, 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: FIXED

The Outlook Team has fixed the issue. You might need to restart Outlook more than once for the fix to take effect in the app.

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See Also

Fixes or workarounds for recent issues in classic Outlook for Windows