Next click Exchange Organizations under Manage Exchange.
Left Click the Organizational Unit Name and choose Distribution Lists.
Right side of page click the Add Distribution List button.
Fill in the Display Name, Email Address and select Group Type. Un-check All Senders are Authenticated and choose the List Administrator form the drop down list. Next select members of the Distribution List. You can also nest Distribution Lists within other lists. When complete select thebutton lower right of screen.
To Edit a Distribution List left click the Organizational Unit Name and choose Distribution Lists.
Left click the Distribution List display name and select Edit. Choose the attribute you wish to edit.