Outlook Add-In behavior (Exchange Outlook setting)
Controls whether the Outlook Add-In behaves in exactly the same way as the HTTP-Only Outlook Add-In. This setting can be useful if you want all users to have exactly the same functionality.
The only differences in functionality are that the HTTP-Only Outlook Add-In does not provide access to the Enterprise Vault properties of items or folders and that it is not possible to specify the destination archive and retention category when performing a manual archive.
Also, the Enterprise Vault mailbox properties tab is not available in Outlook 2010.
Normal. Outlook Add-In behavior is unchanged.
HTTP-only (default). The Outlook Add-In behaves in exactly the same way as the HTTP-Only Outlook Add-In.
If you decide to set Outlook Add-In behavior to HTTP-only, and your existing policies allow users to change Enterprise Vault folder settings, you may want to run Policy Manager to return all folders to your site settings. See the Utilities guide for more information on Policy Manager.