Outlook Cannot delete folders because it contains private items the folders are empty

You need to ask your Exchange administrator to set permissions on that specific folder: Set-MailboxFolderPermission -Identity [email protected]:\Marketing -User [email protected] -AccessRights Owner For more information about this command, see: https://docs.microsoft.com/en-us/powershell/module/exchange/mailboxes/set-mailboxfolderpermission?view=exchange-ps

After that, you will be able to delete the folders. You could also ask your Exchange administrator to delete the folders for you.

You can try to give yourself permissions on those folders, by right clicking the folder and click properties (as the error suggests, but that's probably not going to work, it's possible that someone changed permissions on your folders).