We have replaced on PCs and now have Office 2003 instead of 2000. I use Thunderbird for my e-mail. Previously I used OL2000 as No E-mail configuration, basically contact manager only. I want to do the same with OL2003 so I can automatically insert address into Word when I am writing letter/envelope. However unless I have OL2003 set as default e-mail program it won't work keeps saying "Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client". Any suggestions?