I moved this to the Artemis section of Security Awareness where someone form that department is most likely to spot it.
Meanwhile I suggest following the steps outlined in the link below to temporarily disable VirusScan, restore the files and report them to the McAfee Labs.
Those steps should work whether or not this an Artemis detction or a regular one.
You are right by assuming they wont be there when Word tries to restore them as by Quarantining them they are now encrypted.
Only restoring them from Quarantine will make them available again.