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 Outlook (Classic) update is preventing Windows users from opening encrypted emails. Microsoft confirms the bug and ...
A new Microsoft-issued software patch for Outlook (Classic) on Windows 11 inadvertently broke encrypted email support - ...
Microsoft is looking into a newly identified issue in classic Outlook that prevents users from opening certain encrypted ...
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