Any util add ons for navigating al mail subfolder

Len Raphael

Senior Member
Outlook version
Outlook 2016 64 bit
Email Account
Office 365 Exchange
Since I use Office 365 public folders as my email archive, I have about 5 levels of subfolders and a couple of hundred top level folders. Is there an app that displays a tree that I can just click on the mail folder I need without clicking my way thru the built in hierarchy? or is there a way to force the hierarchal tree to fully expand and then collapse when I want it compact?