FAQ #4: Have MS Outlook Directed to Specific Inbox/Folder on Startup

MS Outlook 2010 and Newer

• MS Outlook> File Menu> Options> Advanced> Outlook Start and Exit...

• You can choose any folder type, however most people will select a calendar, their Inbox, or Outlook Today (select the mailbox folder).             

References: https://www.slipstick.com/outlook/choose-outlook-startup-folder/