I've tried it, and have been going round and round with Samsung Support. I'm an Outlook Tasks user (we have Office 365/Exchange Online). Outlook 2016 (Windows), Nine for Android all sync things as far as Tasks go without issue. Samsung Focus however, is always 1 day off for the Task's Due Date. For me, that's a big enough issue to bring it up to their Support, and not use the app. They said they fixed it by adjusting time zone settings in the app, but for me, it still was not working as it should. I hope their Support will address this soon, they did the first time around so hopefully they'll look at and test it again before the next update comes out.
This was tested on a T-Mo and VZW S7 Edge, both did the same thing. I would like to use it for a week and see how it goes, but right now, I've put that on hold.