How to specify which folder is displayed when Outlook starts
Most people prefer to have Outlook display the Inbox when the application is started. The following tip enables you to specify which folder you would like to be displayed when you start Outlook.
To change the folder which be displayed when you start Outlook, do the following:
1. On the File tab, click Options:
2. In the Outlook Options dialog box, select the Advanced tab.
3. Under Outlook start and exit, choose Browse... and select the folder you prefer to be displayed when you start Outlook:
See also this tip in French: Comment spécifier quel dossier est affiché au démarrage d'Outlook.