Information
PowerPoint attachments opened from Outlook must be in Protected View.
GROUP ID: V-223386
RULE ID: SV-223386r961086
This policy setting allows for determining whether PowerPoint files in Outlook attachments open in Protected View. If enabling this policy setting, Outlook attachments do not open in Protected View. If disabling or not configuring this policy setting, Outlook attachments open in Protected View.
Solution
Set the policy value for
User Configuration >> Administrative Templates >> Microsoft PowerPoint 2016 >> PowerPoint Options >> Security >> Trust Center >> Protected View 'Turn off Protected View for attachments opened from Outlook'
to 'Disabled'.