I've inherited a Windows 2003 / Exchange 2007 server that is a domain controller with the global catalog on it. It is also multi-homed because the Exchange databases reside on an iSCSI SAN. I would like to demote it, but it says I can't until I remove the Certificate services. The articles I've read on this only talk about setting up another server with the same name and backing up/restoring the certificates which I don't really want to do.
We are having all sorts of problems with startup times (currently takes about 30 minutes to restart), sometimes the main network card doesn't work until it is disabled and re-enabled after startup, and when this server is restarting I have some problems logging into other servers even-though I have two other domain controllers on the network. So I think I have multiple issues going on here, but am hoping that getting this server properly demoted will solve a lot of them. Any insight, order in which I should attempt this or general advice would be much appreciated.