HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\Security HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\x.0\Outlook\Security This problem occurs when the MarkInternalAsUnsafe DWORD value is set to 1 under either of the following registry keys. This problem occurs even though the email message was sent to you by another user in your organization (through Microsoft Exchange Server). This file originated as an e-mail attachment and might be unsafe. Unless you need to edit, it's safer to stay in Protected View. Additionally, the following notification is displayed at the top of the document.īe careful - email attachments can contain viruses.
When you open a Microsoft Office document that's attached to an Outlook email message, the document opens in Protected View.
Office document attachments open in Protected View in Outlook