I have been working with Active Directory management for a while, however I have never set up my own forest from scratch before. I have a domain (mycompany.com). I have setup a subdomain (ad.mydomain.com). I have contacted my web host to setup an alias for (ad.mydomain.com) to be my server ip address xx.xx.xx.xx. Do I need a dns server installed for computers to pick up ad.mydomain.com as my AD server? If so, how do I configure the forward and reverse zones. I am sorry I know this is a broad question, but I am a bit lost with my limited dns knowledge. Thank you very much for any guidance.