Rated 5 out of 5 stars

Thanks. Works well with my horde 5 install. It would be nice if it could do contact photo sync also. The tip about the certificate was critical.

This review is for a previous version of the add-on (1.8). 

Thanks for your review.
Contact photos should sync from horde to tzpush. Sending photos is something I will work on. Photos have to be a resized for zpush/activesync before sending.