Policy
Outlook Protection Rules
This policy setting controls whether the Outlook Protection Rules add-in is enabled. If you enable or do not configure this policy setting the add-in automatically downloads Outlook Protection Rules from Exchange and processes them when each Exchange mailbox user composes a new e-mail. If you disable this policy setting the add-in does not download or process Outlook Protection Rules.
2609bda404e4 L_OutlookProtectionRules Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\outlook\addins\umoutlookaddin.formregionaddin\pb4sdisabled (enabled) = 0
HKCU\software\policies\microsoft\office\outlook\addins\umoutlookaddin.formregionaddin\pb4sdisabled (disabled) = 1 Policy notes
This policy setting controls whether the Outlook Protection Rules add-in is enabled. If you enable or do not configure this policy setting the add-in automatically downloads Outlook Protection Rules from Exchange and processes them when each Exchange mailbox user composes a new e-mail. If you disable this policy setting the add-in does not download or process Outlook Protection Rules.