Word attachments opened from Outlook must be in Protected View.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223405	O365-WD-000006	SV-223405r508019_rule		Medium

Description
This policy setting allows you to determine if Word files in Outlook attachments open in Protected View. If you enable this policy setting, Outlook attachments do not open in Protected View. If you disable or do not configure this policy setting, Outlook attachments open in Protected View.

STIG	Date
Microsoft Office 365 ProPlus Security Technical Implementation Guide	2022-09-26

Details

Check Text ( C-25078r442434_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security>> Trust Center>> Protected View >> Turn off Protected View for attachments opened from Outlook is set to "Disabled". Use the Windows Registry Editor to navigate to the following key: HKCU\software\policies\microsoft\office\16.0\word\security\protectedview If the value for disableattachmentsinpv is REG_DWORD = 0, this is not a finding.

Check Text ( C-25078r442434_chk )

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security>> Trust Center>> Protected View >> Turn off Protected View for attachments opened from Outlook is set to "Disabled".

Use the Windows Registry Editor to navigate to the following key:

HKCU\software\policies\microsoft\office\16.0\word\security\protectedview

If the value for disableattachmentsinpv is REG_DWORD = 0, this is not a finding.

Fix Text (F-25066r442435_fix)
Set policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security>> Trust Center>> Protected View >> Turn off Protected View for attachments opened from Outlook to "Disabled".