[Blind-sysadmins] Windows Certificate Services

Hi: I was recently handed our existing certificate infrastructure and told that I now manage it. The guy who used to manage it has left the company and didn’t really leave any documentation behind so I have no clue how things are set up beyond knowing we have three cert servers in the environment and what they do (on paper.) Anyone out there have some good resources for getting started with the Windows Cert environment and learning how Microsoft organized their UI? It seems simple and all MMC-based, so in theory shouldn’t be a big deal, but I’m seeing some odd things, like only 40 issued certificates when I should be seeing over 500, etc. This is all Windows 2012 BTW. Thanks. Ryan