Show separate inboxes for each account
By default, the Outlook folder listThe list of your mail folders visible in the navigation pane, which is the pane on the left side of the main Outlook window. The folder list is only visible in Mail view. groups similar folders, such as inboxes, from all of your mail and Microsoft Exchange accounts. This feature can make it easier to read all your messages at once, without having to move around between mail folders. If you want, you can turn off this feature so that each account and all its folders are separated in the folder list.
On the Outlook menu, click Preferences.
Under Personal Settings, click General .
Under Folder list, clear the Group similar folders, such as Inboxes, from different accounts check box.