Can't open protected messages

lalajee 1,811 Reputation points


Can't open protected message for an single user.

When an user receives encrypted message they cant open them but other users can.

User get following error


I'm not sure why this is happening to this user only, can someone please let me know if anything missing from this users account. All users are office 365 users

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Faery Fu-MSFT 16,236 Reputation points Microsoft Vendor

    Hi @lalajee ,

    Welcome to our forum!

    • In order to verify, is this the page that is redirected when opening protected message?
      If so, it is suggested to clear the browser's cache and cookies then restart the computer and try to log in again.
    • Beside, configure the user's account with other users' computer and see if it continues.

    If you still need more help on this, feel free to contact us.

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