TZPUSH worked well for me a long time. Know I use a new Lumia Phone and a new outlook-profile.
With the same TZPUSH version (1.9.9.9.7) I get duplicate contacts and sometimes wrong birthdays.
It's quite strange: The duplicate contacts only are shown in Thunderbird. In outlook.com and in my Lumia phone there is only one (also not combined).
I also realized that birthday-information is not transferred the right way to outlook.com, something February turns into December.
Does anyone have an idea?
Nevertheless it's a great TB-add-on.
Hutson