To create a distribution list, from within Microsoft Outlook select the address book by simultaneously pressing the CTRL, SHIFT and B keys. It is displayed below.

From within the Addess Book, click on File and then New Entry. A dialog box will appear to ask whether you would like to create a New Contact or a New Distribution List. Select New Distribution List, as shown below and click on OK.

In the name field, choose a descriptive name for the list. Some suggestions might be:
The next step would be to select the people that should be in the distribution list. To do so click on “Select Members”.