Hello
I currently have Thunderbird 60 and BirdieSync 3.2.2.3 installed.
On my Android device I have added contacts to groups or - in the opposite way of looking at it - added one or several groups to a user. This is very helpful to find persons belonging "together".
In Thunderbird, I have done something similar by adding the contacts to distribution/mailing lists.
Unfortunately, the lists of Thunderbird are not automatically mapped to the groups of Android. Thererfore, I have to manage both of them seperately. It would be very nice, if this could be done bei means of synchronisation.
Note: I have set the "Each contact account represents an address book" method.
Best regards