1. Thane
   1. Addition of New AD Server
      1. W2K12
   2. Check if replication is working properly
   3. Shutdown Old server and see if the new server is taking load
   4. Change IP address of new server to OLD SERVER IP
   5. Change Root Hints and Forwarders on the new server
   6. Add DHCP Role to new server
   7. After 2 days
2. Atlanta
   1. Addition of New AD Server
      1. W2K12
   2. Shutdown Old server and see if the new server is taking load
   3. Check if replication is working properly
   4. Change IP address of new server to OLD SERVER IP
   5. Change Root Hints and Forwarders on the new server
   6. Add DHCP Role to new server
   7. After 2 days
3. Chicago
   1. Addition of New AD Server
      1. W2K12
   2. Shutdown Old server and see if the new server is taking load
   3. Check if replication is working properly
   4. Change IP address of new server to OLD SERVER IP
   5. Change Root Hints and Forwarders on the new server
   6. After 4 days
4. Chicago
   1. Move FSMO Roles to new server
   2. Upgrade Domain functional level to 2K8
5. Thane
   1. Demote Old server
6. Atlanta
   1. Demote Old Server
7. Chicago
   1. Demote Old Server