Users are reporting that Outlook is creating folders named “Appt Aux Flags” in their Archive folder.
It's not Outlook's doing, these folders are created by the Norton AntiSpam Outlook add-in and disabling the add-in eliminates the problem.
Once you’ve put a stop to the creation of these folders, deleting them can be a hassle because you’ll get an “Are You Sure” pop-up if you try to delete the folders one at a time. You can avoid the dialog one of two ways: Switch to the folder list then either drag the folders to the deleted item folder or drag the folders into one folder then delete that folder. At most, you’ll get the “Are you sure” prompt only once – when you delete the folder that holds all the other folders. If you prefer to use a utility or have a lot of folders to delete, try Folder Master for Outlook
Note that we don't recommend using anti-spam and antivirus add-ins as they tend to cause more problems than they solve. Outlook writes all attachments to the drive before opening and any viruses will be identified at that time. Server-side anti-spam scanning is best, eliminating the need to download spam. This, along with the high junk mail setting in Outlook (2003 and up), should remove most spam from your Inbox.