You can right click on an email and then click Always Move to Focused. This will tell outlook that you want emails from that particular sender to appear in the Focused section in the future. Emails are moved to focused or other based on past trends and how you treat similar emails. You can override the logic by telling outlook what you want it to do. You can also turn off the Focused Inbox so you only see All and Unread options. Click View, then Show Focused Inbox