These folders have been set in AppleShare for "Can't Move, Rename, or Delete this folder." This is a setting in AppleShare Web & File Admin. If you open up the Disks and Share Points window in the Web & File Admin, navigate to the folder in question, and open up the privileges window for that folder, you will see a check box for "Can't Move, Rename, or Delete this folder." If you remove the check in that box, the locks will disappear.
The AppleShare IP Mail Folder is locked by default when the folder is first created. This is because the mail server depends on the precise name and location of that folder. If the folder is renamed or moved, the mail server will not see the mail database, and users may loose their mail as a result.