. You select the public folder and the archive that is to be used for it. The same archive is used for the folder and its subfolders.
. This adds an Enterprise Vault auto-enabler that then automatically enables folders that are immediately beneath the folder you specify. These folders and their subfolders are all enabled for archiving.
A separate archive is automatically created for each folder at this level. If new folders are added later, they are automatically archived too.
For example, if you add an auto-enabler to \myPublic Folder, new archives are created for \myPublic Folder\Finance and \myPublic Folder\Property. No archive is created for \myPublic Folder\Property\Commercial because that folder uses the same archive as its parent (\myPublic Folder\Property).