You can use EVDominoRetentionPlans.exe as follows:
To load a retention plan definition file into Enterprise Vault, enter the following:
EVDominoRetentionPlans.exe -set pathToUploadXmlFile
pathToUploadXmlFile is the path to the file that contains the retention plan definitions you want to load into Enterprise Vault.
This action overwrites all existing retention plans that are in the current Enterprise Vaultsite.
The change to new retention plans appears in the Enterprise Vault event log as event ID 41238 and event category 'Domino Retention Plan Tool'.
To save the current retention plan definitions in a file, enter the following:
EVDominoRetentionPlans.exe -save pathToDownloadXmlFile
pathToDownloadXmlFile is the path to the file in which you want EVDominoRetentionPlans.exe to save a copy of the current retention plans.
To delete all retention plans from Enterprise Vault, enter the following:
EVDominoRetentionPlans.exe -clear
This action deletes all retention plans in the current Enterprise Vault site but does not affect retention folders. If you want to delete a retention folder you must create a retention plan that specifies the DELETE attribute.