Configuring preferences and options in Outlook on the web for business
Stetnie, For some reason Microsoft is pretending that this reply is to RichardCookson1's post. That is another screw up on their part. I am using Linux Mint. The toggle left pane button is not labeled. It is right under the Home menu item. It is a little square made of 3 horizontal lines. It worked for me. It brought the folder list back permanently instead of having to bring it up every time I open the email client.