Creating Additional Domain Controller

                       Additional Domain Controller—(Backup)

• If you already have one Domain Controller in a Domain, you can add an additional domain controller to the domain to improve the availability of network service.
• Adding Additional Domain Controller can help provide fault tolerance, balance the local of the existing Domain controller, and provide additional infrastructure support to the site.
• The replication type between two read/write DC's is multi-master replication.

Creating Additional Domain Controller

1. Configure the first System1 DC primary server domain name — preetam.com
2. In System2 computer login as  administrator server Operating System —Workgroup
3. Assign the IP address and preferred DNS should be the same.
4. alternate DNS server address is DC primary server IP address.
5. In system2 computer open the server manager console click on add Rolle and features
6. Click next, next, and next.
7. check the box active Directory Domain server.
8. click on add features next, next, next and install.
9. In system 2 server manager console click on the flag and click on promote the server  to a domain controller 
10. select add Domain Controller to an Existing Domain 
11. Type the Domain name Preetam.com
12. click on change
    username:- administrator
    password :- *******
13. click on ok
14. type the password and confirm the password.
15. click next
16. select the  Replicate from Sys1.preetam.com
17. next, next, next, next, install and restart

verification 

1. In system 2  ADC  (backup server) log in as administrator.
2. right click on computer icon click on properties and check the Domain Name preetam.com
3. open the cmd type command net accounts— Role-backup
4. In DC open ADUC create same user accounts check this user account in ADC.