With the migration to Google Groups many groups members' emails are not shown by default in the management console, an example is included below.
To change these settings so that the group members' emails are visible follow the steps below.
1. Sign into Google Groups
2. Click My Groups.
3. Choose a group.
4. Near the top right, click Manage.
5. On the left click on Permissions and then on Access Permissions
6. Next to View Email Addresses click on the drop down menu and select the appropriate setting