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Getting the 'From:' button to show in Outlook 2003 fortunately is a easy thing to accomplish.
How do I get the 'From:' button to show in Outlook 2003?
Compose a new message, click on the View menu, and select the From: item. If you have "smart menus" enabled you may need to wait a few seconds after dropping down the View menu in order to see the From: item if it's not already there.