[389-users] How to rename DIT?

Hello, all. We've recently undergone a corporate name and domain change, let's say from oldname.biz to newname.com. Consequently, we need to rename the top level of our LDAP structure. We installed CentOS Directory Server 8.1 into dc=oldname,dc=biz and now need that entire structure to have dc=newname,dc=com at the top. Everything else stays the same. I realize I'll need to edit all my ACIs and repoint all my LDAP clients, but is there an easy way to rename the tree? I'd hate to try to move all the elements (especially since I believe we can only move leaves) and worse yet have to recreate the entire tree :-(((( I assume it is not as simple as going to the top level object in the directory, going to advanced properties and changing the entrydn. Thanks - John