In this example we use a LDAP Filter to return only those users of a specific AD group, for example:
(&(objectClass=User)(memberOf=CN=SharePoint Team Users,CN=Users,DC=corp,DC=litware,DC=inc))
Choose the SharePoint Group to synchronise from the dropdown.
Adjust the schema map like this so that the AD Account Name is mapped to Login name and Display Name is mapped to Name. Account Name should be the Key Column.
Your completed project will look like this.
Run a Compare A to B which will show the differences and you can now synchronise the member lists.
And now after synchronisation in SharePoint the Group Members is populated.
Now that the users have been correctly added to SharePoint you can also setup a standard SharePoint List sync with the User Information List to populate other meta data from AD into SharePoint.