I'd say soon
We don't have any date, it depends always on the number and priority of issues found.
This is a good example of what I'm saying
In my point of view, a final version can be released even if a feature of a module doesn't work correctly (ActiveSync in this case) but different users have different priorities.
We are always trying to balance between users and developers needs
Regarding your issue, what module are you using for ActiveSync? WebTop 4 or SOGo?