These instructions assume you have permissions set as owner of the global distribution list.
Modify Email Distribution List Membership PDF
Click "Address Book" icon from top ribbon
Make sure you are looking in the "Global Address List" or in "All Groups"
Find the group you want by typing the name in the blank white box. For example:
Double-click on the group name to open the distribution list window
Click the "Modify Members" bar
A membership list will appear
To remove a member: highlight an entry and click "Remove"
To add a member, click the "Add" button and a global address list will appear
1. Scroll until you find the correct entry
2. Start typing the complete name in the white box
3. Click "Advanced Find" and you can search on last name
Click "OK" until you close the Address Book