Configure Outlook object model prompt when reading address information

This policy setting controls what happens when an untrusted program attempts to gain access to a recipient field, such as the ''To:'' field, using the Outlook object model.

If you enable this policy setting, you can choose from four different options when an untrusted program attempts to access a recipient field using the Outlook object model:

- Prompt user. The user will be prompted to approve every access attempt.
- Automatically approve. Outlook will automatically grant programmatic access requests from any program. This option can create a significant vulnerability, and is not recommended.
- Automatically deny. Outlook will automatically deny programmatic access requests from any program.
- Prompt user based on computer security. Outlook will only prompt users when antivirus software is out of date or not running. This is the default configuration.

If you disable or do not configure this policy setting, when an untrusted application attempts to access recipient fields, Outlook relies on the setting configured in the ''Programmatic Access'' section of the Trust Center.

Supported on: At least Windows 7
Guard behavior:


  1. Prompt User
    Registry HiveHKEY_CURRENT_USER
    Registry Pathsoftware\policies\microsoft\office\16.0\outlook\security
    Value Namepromptoomaddressinformationaccess
    Value TypeREG_DWORD
    Value1
  2. Automatically Approve
    Registry HiveHKEY_CURRENT_USER
    Registry Pathsoftware\policies\microsoft\office\16.0\outlook\security
    Value Namepromptoomaddressinformationaccess
    Value TypeREG_DWORD
    Value2
  3. Automatically Deny
    Registry HiveHKEY_CURRENT_USER
    Registry Pathsoftware\policies\microsoft\office\16.0\outlook\security
    Value Namepromptoomaddressinformationaccess
    Value TypeREG_DWORD
    Value0
  4. Prompt user based on computer security
    Registry HiveHKEY_CURRENT_USER
    Registry Pathsoftware\policies\microsoft\office\16.0\outlook\security
    Value Namepromptoomaddressinformationaccess
    Value TypeREG_DWORD
    Value3


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