Configuring preferences and options in Outlook.com
That does not remove the right hand side ad pane. It just leaves you with dead space. This sucks and I'll be looking for another way to get my mail.
Microsoft "This is NOT GOOD" hate it. Change this back or lose more customers. Google here I come.
If you would read through the entire thread you would have found this:
Install "Webmail Ad Blocker" extension to remove that ANNOYING ad bar on the right.
Do a google search for "Webmail ad blocker" to find the appropriate download for your version of Windows.....