I've noticede that in my mail folder of my Notes server some new subfolders have appeared. These new subfolders have a .ft extension after it. For example a new subfolder appreard called username.ft. Each if these new .ft folders have the same subfolder structure, each containing subfolders such as morgue, assists, style, pdd, temp, tpoicidx, trans and work. One of these .ft folder has gotten to be 18mb is size. Not sure what it is and if its safe to delete it. I have a total of 70 users on this sever, and only 5 of them have somehow created the .ft folder in the mail folder. Is it ok to delete it?