GPO tool

Group Policy made searchable

A free ADMX browser or comparison tool for IT administrators.Search policies, find registry keys, and see exactly what each setting writes to the Windows Registry. Or compare two GPO backups to see exactly what has changed between them.

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Use Protected View for attachments received from internal senders

This policy setting allows you to determine if attachments received from senders within your organization open in Protected View. This setting only applies to Outlook accounts setup to use an Exchange server.

If you enable this policy setting, attachments received from senders within your organization open in Protected View.

If you disable or do not configure this policy setting, attachments received from senders within your organization do not open in Protected View.

Registry Information

VendorMicrosoft
ProductMicrosoft Outlook 2016
CategoryMicrosoft Outlook 2016 › Security
Applies toUser Configuration
Supported onWindows7
Registry Key[HKCU]softwarepoliciesmicrosoftoffice16.0outlooksecurity
Value Namemarkinternalasunsafe
TypeREG_DWORD
Enabled value1
Disabled value0

Registry File (.reg)

Windows Registry Editor Version 5.00

; Enable the policy
[HKEY_CURRENT_USERsoftwarepoliciesmicrosoftoffice16.0outlooksecurity]
"markinternalasunsafe"=dword:00000001

; Disable the policy
[HKEY_CURRENT_USERsoftwarepoliciesmicrosoftoffice16.0outlooksecurity]
"markinternalasunsafe"=dword:00000000

PowerShell

# Enable the policy
Set-ItemProperty -Path "HKCU:softwarepoliciesmicrosoftoffice16.0outlooksecurity" -Name "markinternalasunsafe" -Value 1 -Type DWord

# Disable the policy
Set-ItemProperty -Path "HKCU:softwarepoliciesmicrosoftoffice16.0outlooksecurity" -Name "markinternalasunsafe" -Value 0 -Type DWord