For  (Microsoft Outlook) to automatically go to your inbox when opened.

Open Outlook and go to Tools--Then click on Options-On the Options panel (shown below) you'll notice the selection tabs at the top.
Choose "Other" as shown below

Now choose "advanced options" as shown in the panel below
 

Now Click On the browse button to choose the folder that will open automatically
as shown below and select what folder you want to open first.