Tag Archives: Domain Controller

How to add a Windows Server 2008 R2 Core as Secondary Domain Controller (replica)

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This is a small How to which shows you how you can add a Windows Server 2008 R2 Core as a Secondary Domain Controller or Replica.

  1. sconfig Windows Server 2008 R2First configure the Core Server, Name, Domain, IP Adresse and more. You can use the command sconfig to run the Server Configuration Utility.
  2. Now you can go back to the Command Promt.
  3. Now you have to possibilities to install a Domain Controller. First you run dcpromo with a unattend file you have created and copied on the server, or you run dcpromo with some parameters. I decided to run dcpromo with the necessary parameters because I just need a simple replica.
  4. Now you can run the command on the Command Promt
    Dcpromo Windows Server 2008 R2 Core Dcpromo /unattend /replicaOrnewDomain:replica /replicaDomainDNSName:corp.pepsi.local /ConfirmGC:yes /username:corp’administrator /Password:* /safeModeAdminPassword:PepsiPassword
  5. After that the Server will run the installer and reboot.
    Windows Server 2008 R2 Core DCPROMO
  6. A replication connection was created
    Windows Server 2008 R2 AD Replication

If you need more Information about Active Directory Creation on a Windows Server 2008 Core Server you can checkout the Microsoft KB947034.

Time sync problems with Hyper-V Guests

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If you have time sync problems with Hyper-V Guest Systems there is a simple solution for this.

Problems:

  • Time between Server and Active Directory Domain Controller is not correct
  • Can’t login because of this
  • Can’t add AD Users to local groups

Solution:

To solve this problem you have to disable Time Synchronization in the Hyper-V Integration Services for each guest. Then restart the Windows Time serviceon the guest. The guests will then correctly synchronize with a domain controller.