0 - Turns off Vault Cache for this user. No new Vault Cache is
created. The user has access to an existing Vault Cache, but no new
items are added to an existing Vault Cache.
1 - (Default) The user can enable Vault Cache.
Description
Controls whether the user can enable Vault Cache.
Note:
This registry value performs the same
function as the Exchange desktop policy setting "Make Vault Cache
available for users", which you can set through the Administration
Console. For more information on the policy setting, see Setting up Exchange Server archiving.