There are two different ways to display the names of members of a group or mailing list in Outlook before sending an e-mail message addressed to that group or mailing list. The first method works for both groups and distribution lists, while the second method works only for distribution lists. You will not see members of dynamic lists (examples: People by ID Type, People by Building, People by Department, etc).
Contact Card
In order to see the members of a group or distribution list in Outlook, follow these steps:
1. Enter the group's name into To, Cc, or Bcc field.
2. Click on Check Names icon on the ribbon or press Ctrl + K to validate group's name.
3. Point your cursor at the group's name until a Contact Card pops-up on the screen, then click on the chevron icon to expand it:
4. On the expanded Contact Card, click on Members tab to display the list of names.
Expanding a Distribution List
In order to see the members of a distribution list in Outlook, follow these steps:
1. Enter the lists's name into To, Cc, or Bcc field.
2. Click on Check Names icon on the ribbon or press Ctrl + K to validate list's name.
3. Click the plus sign (+) next to the name of the distribution list to show the list members.