Outlook - How To Send As Another Email Address

Open a New Email in Microsoft Outlook.

Select the Options Tab.

Select From in the Show Fields section. This will add the From field to your email.
 

Select the From Drop-Down Menu above the To field.

Select Other Email Address.
 

Select From.
 

Select More Columns.

Ensure the Global Address Book is selected in the drop-down menu.

Search for the Email Address you wish to send from.
NOTE: You will need to ensure you have access to send from that email address.

Select Ok.
 

Select Ok.
 

Continue Entering the rest of your email.