In Exchange system manager when I highlight any of my top level public folders I get a pop up window with an error. The window states No Interface id no. 80004002 Exchange system manager I get two of these pop up. Once I have ok'd these I then can click the properties of the public folder tree but I don't get the replication tab ? I also am not able to create any folder below the top level (the right click option dpoes not appear)? This happens with any public folder tree I have or create. Any help would be appreciated. Leo