Force messages into the Focused inbox
Outlook uses a Focused inbox to keep messages that it thinks are priority separate from “other” messages. Sometimes it gets it wrong. You can tell Outlook to send future messages from specific people to the Focused section of you Inbox.
Instructions
When a message gets filed way in the “Other” folder and you want it sent to your focused inbox, you have two options:
Send just this message to the focused inbox
Send all messages from this sender to the focused inbox
While the message is still in the “Other” section of the Inbox, right click (Ctrl-click on a Mac) and select the appropriate option from the pop-up list: