I have Thunderbird (v 52.4.0 - 32-bit) installed on 2 PCs, the one nearest to the cable-modem (running WIN 7 ultimate 64Bit for about 2 years now) acts as an email-server for the second PC. As long as I had XP pro on the second PC there were no troubles whatsoever with getting & sending mails on the XP-machine. There, three weeks ago, I changed the system from XP to Win7 ult. 64 and installed Thunderbird 52.4.0 using the profile from the server. That has functioned under XP without any problems. Now I can get and send mails and have all functions like folders and rules active, but I no longer have access to the addressbooks on the server computer. The addressbooks on the second PC are empty (but for the few mails I have got and sent). So, how can I get the addressbooks from the server to again run on my second computer? Thanks in advance. Peter