the contacts sync does not work flawlessly with the free groupware Tine 2.0 (www.tine20.org). Contacts can be synced but unfortunately the fields are not matched correctly.
The mobile phone number field in Tine 2.0 (in German: Handy) is synced to the em Client field professional 2 (in German: Geschäftlich 2) and the mobile phone number field in em Client remains empty.
Same problem with e-mail adresses - in Tine 2.0 they are considered private e-mails in em Client they are suddenly business e-mails.
I always thought that CardDav is an open standard - however, there seem to be completely different implementations.
What can I do about that?