If you want to search all mail items (Inbox and Sent Items) in Microsoft Outlook 2007 for the text: “test” and group by received date and not date and time:

Click in the Menu on Go > Mail :

Click on “All Mail Items”

Click in the Menu on View > Current View > Customize Current View… > Other Settings

Check the “Show items in Groups”

This will group by date and not date and time, the group by box contains a field: Date

This will group by: Yesterday, then all days of the current week, then last week, then all weeks of current month, the last month, then older