Server.app in Lion is a pretty good app for most tasks. But I find myself frequently doing things that I don’t think developers intended me to do. One such item is setting up and tearing down Open Directory to test various iterations of enabling a master. I frequently use slapconfig to destroyldapserver: slapconfig -destroyldapserver Doing so almost immediately allows me to demote an Open Directory master to a stand-alone server and then repromote the server to a master or replica for testing purposes. If you do this, then Open Directory cannot be set back up using Server.app. The fix is to use Server Admin to repromote your server back to…