You can perform any data management action on the folders which are listed as Inactive subfolders.
To manage inactive subfolders:
Archive - Click to archive the folder(s) using Enterprise Vault.
Custom Action - Click to execute a custom action.
Retention Category: Select an option to indicate how long the archived data has to be stored, before it is allowed to be deleted.
Post Processing Action: Select an option to indicate how to handle the source data, after the archive operation is complete.
Click Archive.