A while back some users have asked this similar question. They want to publish Outlook "Free/Busy info" to DriveHQ FTP server. However, after testing it, we realize that Outlook doesn't support Passive FTP. So it can only published to an intranet based FTP server, which makes it un-usable.
Since then, we have released a new version FileManager that supports Group Sharing, and two-way folder synchronization. With this support, you can publish Outlook Free/Busy info to your local folder and synchronize it to a Group Shared folder on DriveHQ, which then synchronize with other group members. So now it should actually work. But we have not officially supported it.
