I tried syncing a birthday field, and it works as expected.
automatic account generation for multiple address books
I understand that only one addressbook is possible per android account (https://davdroid.bitfire.at/faq/entry/only-one-addressbook/), but could it be possible for davdroid create “virtual” android accounts for each addressbook? so I don’t have to insert 5 times my dav account?
Knowing if this is going to be implemented would help me to decide deploy this app in my office, or search for alternative.