Address Book
Delete Address-Book Group
Click "Address Book Setting".
Select the group (e.g. "sample_group01") in the "Address-Book Group Name" field under "Delete Registered Address-Book Group".
Click "Delete Group".
The "Confirm Deletion of Address-Book Group" page appears.
Click "Delete".
The "Deletion of Address-Book Group Completed" page appears, and the address-book group is deleted.