Account order

Using the Folderpane Tools extension

To change the order of accounts in the folders pane, try using the Folderpane Tools extension. Make sure to read the usage instructions carefully, and note that the account you set as the default account will be listed first in the folders pane. If you don't know what an extension is or how to install one for Thunderbird, visit the extensions page at Thunderbird Help.

Manually editing the prefs.js file

Alternatively, you can change the order of your accounts in the folders pane by modifying prefs.js as described in this thread. The prefs.js file is found in your profile folder. If you have trouble figuring out which accounts are assigned to which account numbers in prefs.js, or if you try changing the order of accounts in prefs.js but the order displayed in Thunderbird's folders pane is not what you expected, see this thread for further information.