Gidday, I've had this problem since performing a swing migration from a SBS2000 server to SBS2003. I created a new public folder store on the new server and imported existing public folders via a .pst export/import. From MS Outlook, I can view public folders and create new public folders fine. But when I try and mail-enable a public folder through exchange system manager, when I right-click on the folder I receive: Exchange System Manager The operation failed because of an HTTP error 440 ID no: c1030af4 I've checked all the permissions I can think of within IIS on the exadmin vdir and can't see any problems. I've also searched for this error fairly extensively but haven't been able to find any other posts (apart from my own) for this exact error. There seems to be quite a few people that get the c1030af4 error but it's never with the HTTP 440. Any ideas??? Miles.