Rated 1 out of 5 stars

JakeV - many thanks. I've installed gContactSync and it is working.
https://addons.mozilla.org/en-us/thunderbird/addon/gcontactsync/?src=dp-dl-oftenusedwith

Rated 5 out of 5 stars

JK4Ubuntu - can you please post a link to the new addon you are using that is working? Many thanks!