You can view the memberships of Global Address Lists or created distribution lists so that you know to whom you are sending a message.
Viewing memberships of a list
To view memberships of a list,
- compose a new message as usual.
- Add a list to the To:, Cc:, or Bcc: fields as usual.
- In the Outlook client, double-click the list. In the Outlook Web App, single-click the list. The list's properties will appear.
- Click Members. The members will be listed.