Synchronization of contacts and calendars with Mozilla Thunderbird 2 can be accomplished by using the Funambol plug-in and the Lightning plug-in for Thunderbird 2, free downloads from https://addons.mozilla.org/en-US/thunderbird. The Funambol plug-in uses the SyncML 1.2 protocol, which is fully supported by Go Web’s synchronization servers.

After installing the plug-ins, users will need to configure the Funambol plug-in from within the Thunderbird interface. To configure the plug-in, click Tools on the menu bar. Then click Funambol Plug-in and click Options. Enter your server location in the server URL field (using the format http://gowebsync.com/sync/default.axpx); enter your username (using the format username@domainname.com); and enter your password. Now click on the Synchronize tab and select the items you want synchronized (contacts and/or calendar). To synchronize the calendar, you will need to click on the Details button and change the remote name to scal. Click OK and Click to Synchronize.