Use the utilities on this page to help manage the Outlook folders displaying in the navigation pane. These utilities can prevent you from accidentally moving or deleting folders, or hide the default folders you don't want to show in your folder list.

Outlook Folder Utilities

Tools

Attach2Cloud	Attach2Cloud Automatically uploads and shares your Outlook attached files on OneDrive and replaces them by OneDrive shortcuts in your emails at the time you click on Send. Thanks to Attach2Cloud, you can now attach files up to 15 GB unit size to your Outlook emails without any email size limit. These files will be automatically uploaded to OneDrive and shared with the recipients of your emails. Attach2Cloud also enables you to set OneDrive permissions, target folder and elapsing dates to the attached files to upload.
CodeTwo Move & Delete Watchdog	CodeTwo Move & Delete Watchdog warns about unintentional moving or deleting folders in Microsoft Outlook. Whenever you move a folder in Outlook's navigation pane or are about to delete something from the Outlook folder tree, a popup dialog appears asking for your confirmation. You can configure it to notify you when you move a folder, delete it, or in both of these cases. Free.
HideOutlookFolders	Utility hide unused folders in Outlook data files, include RSS, Calendar and Contacts in other .pst files.