I have a single server setup that I installed the active directory role on then promoted to a domain controller. This server was a domain controller at one time, but was demoted because it no longer needed that functionality. After the promotion I was able to log into the server but when trying to get into any Active Directory function I am getting an error that either the Domain doesn't exist or that it is unreachable. I am also unable to see the SYSVOL and NETLOGIN directories when running a NET SHARE. All posts that I have read point to a DNS issue, but I have had very little luck finding anything wrong with DNS. Could there be issues because this server was once a DC and demoted and now I am using it as a DC again?