How to migrate DNS Server

The Windows Server 2012 wizard normally performs this task automatically. Thus, the following steps may or may not be necessary:
 
1. Transfer Records from the Current DNS Server
  1. Click Start, point to Administrative Tools, and then click DNS.
  2. Expand ServerName, where ServerName is the name of the server.
  3. Right-click Forward Lookup Zones, and then click New Zone.
  4. Click Next.
  5. Click Secondary zone, and then click Next.
  6. Type the name of the zone in the Zone name box, and then click Next. In this example, type microsoft.edu.
  7. Type the IP address of the current primary DNS server in the IP address box (in this example, type 192.168.0.2), click Add, and then click Next.
  8. Click Finish.
  9. Right-click Reverse Lookup Zones, and then click New Zone.
  10. Click Next.
  11. Click Secondary zone, and then click Next.
  12. In the Network ID box, type 192.168.0, and then click Next.
  13. Type the IP address of the current primary DNS server (in this example, 192.168.0.2), click Add , and then click Next.
  14. Click Finish.
2. Change the role of the DNS server
After you transfer all of the records, you must remove the old DNS server from the network, and then set the DNS server as the primary DNS server. To set the DNS server as the primary DNS server, follow these steps:
  1. Click Start, point to Administrative Tools, and then click DNS.
  2. Expand ServerName, where ServerName is the name of the server.
  3. Expand Forward Lookup Zones.
  4. Right-click the Microsoft.edu zone, and then click Properties.
  5. Click the General tab.
  6. Click Change, and then click Primary zone. If the DNS server is a domain controller, click to select the Store the zone in Active Directory (available only if DNS server is a domain controller check box.
  7. Click OK.
  8. If you want to permit dynamic updates, click Nonsecure and secure in the dynamic updates box.
  9. Click OK.
     
    Note The server is now configured as a primary DNS server for the DNS domain space.

Alternative method for multiple zones environment:
1. Export DNS server records from existing server
2. Import DNS server records to new server

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