Outlook cannot open encrypted emails
8 janvier 2026 à 15:41
Microsoft 365 users face a critical bug in Classic Outlook that prevents recipients from opening encrypted emails. In Classic Outlook, trying to open an encrypted email shows a specific error message in the Reading Pane: "This message with restricted permission cannot be viewed in the reading pane until you verify your credentials. Open the item to read its contents and verify your credentials." This issue stems from a client-side regression in how Classic Outlook handles encryption settings, and Microsoft is currently investigating the problem.