It’s worth noting that there will be different methods of combining inboxes, with varying levels of complexity and effectiveness. Just pick what task you’re trying to accomplish, and follow the steps.
It’s not difficult to set up, but figuring out exactly which method you need to use can be a little tricky. It also has tools to merge inboxes into one, so you can manage everything from one place. Outlook has a lot of features to split your inbox up into different inboxes, which you can use for different purposes.