When you delete a suffix, you permanently remove all of its data entries from the directory. You also remove all suffix configuration information, including its replication configuration.
You cannot delete a parent suffix and keep its sub-suffixes in the DIT as new root suffixes. If you want to delete an entire branch that contains sub-suffixes, you must also delete the sub-suffixes of the deleted parent and their possible sub-suffixes.
You can use DSCC to perform this task. For information, see Directory Service Control Center Interface and the DSCC online help.