I am wondering if vault operations are only triggered by

a) a manual vault operation and
b) user delete (if configured to vault on delete)

or if there is any other condition that may trigger vaulting. I am asking,
because I want homedirs to be vaulted automatically ONLY on deletion,
NOT on policy reassign, full backfill operations or whatever may trigger
Btw. would I have to create a vault rule in this case ("*.* -> Vault") or are
rule necessary only for manual vault operations?

Thanks, Lothar