Thanks for your reply, I managed to restore the individual mailboxes to the ones instead of the whole information store. Now I have another problem, I can't restore the Public Folders. I have tried to restore the Public Folder items redirected to a mailbox and the restore jobs reports it is succesful. When I log in to that mailbox however I can't find anything new. Shouldn't the job report a failure if the files weren't restored? Or are they actually in that mailbox somewhere?
The Small Business Server 2003 was installed with a new name and the Information Store and Public Folder Store also have this new name. As redirecting the public folder items to a maibox doesn't seem to work, can I restore those items in another way? I don't have a backup of the physical files, only of Microsoft Exchange Mailboxes, Microsoft Exchange Public Folders and the Information Store (Mailbox Store and Public Folder Store).