Policy
Always open untrusted database files in Protected View
This policy setting controls whether database files (.dbf) opened from an untrusted location are always opened in Protected View. If you enable this policy setting, database files opened from an untrusted location are always opened in Protected View. Users will not be able to change this setting under File > Options > Trust Center > Trust Center Settings > Protected View. If you disable or don’t configure this policy setting, database files opened from an untrusted location are not opened in Protected View, unless users have changed this setting in the Trust Center. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.
b0bd8c943ef4 L_EnableDataBaseFileProtectedView Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\excel\security\protectedview\enabledatabasefileprotectedview (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\excel\security\protectedview\enabledatabasefileprotectedview (disabled) = 0Policy notes
This policy setting controls whether database files (.dbf) opened from an untrusted location are always opened in Protected View. If you enable this policy setting, database files opened from an untrusted location are always opened in Protected View. Users will not be able to change this setting under File > Options > Trust Center > Trust Center Settings > Protected View. If you disable or don’t configure this policy setting, database files opened from an untrusted location are not opened in Protected View, unless users have changed this setting in the Trust Center. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.