The user has be default read-only permissions to his archive mailbox. When using the Zarafa Archiver for storage optimization it’s recommended to give the user write permissions to the archive mailbox. By giving write permissions, the user can remove older email from the archive mailbox by him/herself. The default permissions on the archive mailboxes, can be set with the following option:

auto_attach_writable    = yes

When a user deletes an item from the primary mailbox which is also available in the archive, the item is by default only removed from the primary mailbox. In this case the item can also be opened again in the the archive mailbox. In an archiving setup for storage optimizations it’s recommended to directly delete the item also from the archive mailbox. This can be done, by setting the following option to delete.

cleanup_action          = delete