Outlook envelope icon in the taskbar


New Email
I started to use filters on my incoming email in ms outlook to split it into different (sub)folders. But now the outlook envelope icon no longer shows in the taskbar. The incoming email is split based on the "to" address. It 's an email account with several aliases which are delivered to the same inbox on the server. Is the a way to keep the envelope icon in the taskbar and still split the new email into different (sub)folders?