(they're displayed but we can't manage them: they don't appear in zimbra's tags/labels menu) 

This is very annoying because we have a group mailbox where the tags are used to divide up the work and when we're away in webmail mode, it's impossible to find our mail.

we've already customized the pref.js file to tune the tags between each machine, so i'm thinking there must be a command in "pref.js" that lets you create tags recognized by the server and vice versa.

thanks for your insight 

Hello We use Thunderbird for our emails with a zimbra provider, The problem is that when we're away and teleworking, our teams use webmail and thunderbird's tags don't really go back up to the zimbra server. (they're displayed but we can't manage them: they don't appear in zimbra's tags/labels menu) and conversely, zimbra's tags don't go back down to thunderbird at all. This is very annoying because we have a group mailbox where the tags are used to divide up the work and when we're away in webmail mode, it's impossible to find our mail. does anyone have a clue? we've already customized the pref.js file to tune the tags between each machine, so i'm thinking there must be a command in "pref.js" that lets you create tags recognized by the server and vice versa. thanks for your insight PS: we can compensate the solution.