Shortcut to switch between all open Outlook windows and messages

I often have more than one Outlook window open. For instance: the main Outlook window, the Reminders dialog and some emails.

While I could use ALT+TAB to switch between them, the multitude of other application windows which I have open makes it quite cumbersome and also difficult to quickly select the correct one.

Is there an easy way to switch only between the open Outlook windows and messages?