Server2012R2实现活动目录(Active Directory)双域控制器互为冗余

在活动目录中部署两台主控域控制器，两台域控制器互为冗余。

Server 2012 R2新建活动目录和DC

refer to： https://www.cnblogs.com/jfzhu/p/4006118.html

Add another domain controller as backup domain controller.

1. Create vm and rename computer name

2. Close firewall

3. Add existed DC ip as DNS of the backup DC

3. Join this machine to existed domain

4. Install Domain Controller service

Open server manager and click add roles and features

select Role-based or feature-based installation

Click next

select Active Directory Domain Services

Install feature

4. Promote server to a domain controller

select add a domain controller to an existing domain

5. Check two domain controller DNS manager and add two domain controller ip and FQDN for different option

check zone replication scope

add other domain controller ip in name server record of domain properties

add another domain controller ip in zone transfers

check and change the backup dc dns manger

Open Active Directory Users and Computers, we can find all the computers existed dc in backup domain controller