Fields in Microsoft Outlook can be added using the View Settings page. Fields are also referred to as columns in versions of Outlook newer than 2007. Adding columns customizes how you see information in your Inbox or in the list views of your Contacts or Tasks.
Open the View menu and click View Settings.
Select the field from the Available columns list and click Add.
If you want to use a field that is not listed, click New Column.
Name the column you are creating.
Choose the type of column you want to create.
After choosing a name and type for your new column, click OK to add the custom column.
By default, you'll see Frequently used fields. If you don't see the field you want, use the drop-down menu to choose from other fields, such as Date/Time fields or Address fields. After you have made your selection, click Add. After adding the fields you want to use, click OK.