Rated 5 out of 5 stars

by Abel Stern on Aug. 25, 2015 ·

This is a wonderful plugin, and version 1.9.9.9.1 works well with one.com. For Exchange servers that do not offer EWS functionality, this is the only way to sync with Thunderbird I know of. The vCard fields that version adds which Thunderbird lacks by default are a great improvement, especially the Middlename field. The plugin is quite easy to use, but some testing to find the right settings may be advisable.

The support is truly great. When I noted at the forum that version 1.9.8.6 had some difficulties with one.com, I received a response within hours and a patch that solved everything within two days!

This review is for a previous version of the add-on (1.9.8.6).