Hi, We just upgraded our domain to 2000 from NT and deployed Exchange2000 for groupware purpose (mail server still is Linux Sendmail). After make team folder as Offline Folder in Favorites of Public Folder, whenever we work on, such as Calendar or Tasks in the team folder, in offline situation, there are some error messages saying unable to send mail. Is there anyone who came across this problem before? Thank you so much for sharing your idea. Thanks. Ray PCCW Japan