Outlook 2007 can use either public folder security forms or Group Policy to manage security for attachments and for add-ins.
When using configuring the Outlook Security Settings in Group Policy using the 2007 Office system Administrative Template files (outlk12.adm) and the following policy:
Microsoft Office Outlook 2007 | Security | Security Form Settings | Outlook Security Mode | Use Outlook Security Group Policy
Users may be prompted with "A program is trying to automatically send e-mail on your behalf."
If the policy is set as follows, and the appropriate Public Ffolder and form is created, the issue does not exist:
Microsoft Office Outlook 2007 | Security | Security Form Settings | Outlook Security Mode | Use Security Form from 'Outlook Security Settings' Public Folder
The Outlook Security Settings are not equivalent between Public Folders and Group Policy.
Specifically the following policies are only available in Public Folders and not in the Group Policy under Microsoft Office Outlook 2007 | Security | Security Form Settings | Programmatic Security:
- When sending items via CDO
- When sending items via Simple MAPI
- When accessing the address book via CDO
- When resolving names via Simple MAPI
- When accessing address information via CDO
- When opening messages via Simple MAPI
Information for administrators about e-mail security settings in Outlook 2007
http://support.microsoft.com/kb/926512
Originally, there were plans to include settings for the following Simple MAPI operations:
- A program sends items by using Simple MAPI
- A program resolves addresses by using Simple MAPI
- A program opens a message by using Simple MAPI
However, these settings were not added to the product in the release version of Outlook 2007. We are researching the ability to add this functionality to the GPO settings. These settings may be included in a future release.
A forthcoming hotfix 953925 and an updated outlk12.adm will address the Simple MAPI operations in Group Policy.
Articles soon to be published:
http://support.microsoft.com/kb/953925
The programmatic security settings cannot be configured successfully when you configure the Simple MAPI settings in Outlook 2007 by using the Group Policy object
http://support.microsoft.com/kb/953806