Could you provide some details about what you're referring to? Are you missing entries in your personal address book? We'll need some more info about your Thunderbird setup. # Go to '''[=] > Help > Troubleshooting Information''' then click '''Copy text to Clipboard'''. # Go to https://pastebin.com and go to '''Edit > Paste''' to paste the info from your Troubleshooting Information page. # In Firefox, click on the three dots to the right of the address, and select '''Copy Link'''. # Open a reply to this post, and go to '''Edit > Paste''' to paste the link to your troubleshooting information.