CloudBerry Backup now warns about EFS encrypted files instead of backing them up The solution is not an easy one for file / folder backups that need to access EFS encrypted files created by users other than the service account that is running the backup service. Windows prevents such access, as you're aware. I assume if you're using EFS at the user level, you have a reason for doing so. The easiest way around this might be to perform an image backup instead. You can restrict the image to just the folders needed using the Exclude Option. But the caveat here is that in order to restore files to a system other than the one that was used for the backup would require you had the certificates and would have to back them up. In my opinion, this adds additional complexity you may not want to absorb.
I saw your earlier post about MozyPro, but when I check other products like CrashPlan, Carbonite, Acronis, and Veeam, I see information which would suggest that it's not supported on those platforms either. It's possible some of these other products do what you need, but I haven't come across that information.
The requirement, as you noted, has been pushed to 7.4, which is some time off. At this point I do not think it would be realistic that it will be added in a time-frame you need it (if at all). I know the team is looking at options and if something is found during their research, they will re-prioritize.
I would like to ask why you are using EFS, are you using it for more than one user, and whether Bitlocker encryption would suffice in its place since it's whole-drive encryption - and we support it?