Please note that in our most recent 6.12 Beta 4 version release we've implemented a new mechanism of importing computers from Active Directory to address books via RU Server. You can find more details on how the new mechanism works in this blog post.
Unfortunately, we cannot provide a specific ETA on this feature yet, but, hopefully, more features for the AD integration will become available in our stable version release which we plan to release by the end of this month. You can always find the list of included features for the latest updates on the Release Notes page here. The latest 6.12 Beta 4 is available for download on this page. In case if you plan to update your installation, please make sure to update both Host and Viewer to the same version to avoid version mismatch that might lead to performance issues or some feature not working.