CB (FYI - CB is also referred to on these forums as CBU) does not use the archive bit - it has it’s own method of tracking file changes.
While I have confidence in the product and use it to safeguard over 40 Pcs, it does a few odd wrinkles. For example, the following with Outlook 2007 - don’t know about other clients.
One annoying (to me , at least) thing is with the email backup. While CB does a great job of backing up the emails, folders, rules, contacts, etc. - one amazing thing it misses is the actual account information. To do a restore, you have to set the accounts up manually and then restore the archived data. You cannot perform a restore to a fresh installation of Outlook
It all works and has saved my bacon a couple of times, it would certainly be easier if the account info was embedded in each backup or you could backup the aco[CENSOR - Ban this user!!] info separately.