Maintaining Membership Lists
Each group or organization has a membership list, which lists the principals that are members of the group or organization. Members of a group can be principals from the local or foregin cells. Members of an organization must be from the local cell only. Use the dcecp group add command to add members to the membership list and the dcecp group remove command to remove members from the list.
If you delete a member from a group or organization, any accounts for the deleted member that are associated with the group or organization are also deleted. For example, if you delete the principal mahler from the group symphonists, the account mahler symphonists classic is also deleted.
Note that the deleting of a principal from a group or organization can affect the principal's rights to objects. This change takes effect only when the principal's ticket-granting ticket is renewed. See Creating and Maintaining Accounts for more information on ticket renewals.
More:
Effects of Account Creation on Membership Lists
Adding and Deleting Group Members