__
__
Step A: Open Outlook and Click on "New E-Mail" (2), this will open a new window.
Step B: Click on Options (3), then you'll find a button named "From" (4). With a click on that button, you'll see littles changes on your screen.
Step C: Open the dropdown menu with a click on "From"(5) and select "Other Email Address..." (6)
Step D: Click on "From" (7) and then its important to select "Offline Global Address List" from the Address Book dropdown. (8)
Search for the Email address you want to send a Email from and double click it. Confirm it with "OK".
From now on you will see the "From"-Button (5), everytime you write a new Email, with that button you can easily ajust the sender address.