I hope this will give you some ideas.
To install the Configuration Storage server, or both the Configuration Storage server and ISA Server services on a domain controller, follow these steps:
Important: If you install the Configuration Storage server and ISA Server services simultaneously, the setup process will restart the Routing and Remote Access service. If your initial VPN connection was established using Routing and Remote Access, this will prevent completion of the Configuration Storage server installation. For this reason, we recommend that you first install the Configuration Storage server as described in this procedure, and then install ISA Server services as described in Modifying an ISA Server Installation.
On the target computer, log on to the domain as an enterprise administrator.
Insert the ISA Server CD into the CD drive, or run ISAAutorun.exe from the shared network drive.
In Microsoft ISA Server Setup, click Install ISA Server.
After the setup program prompts that it has completed determining the system configuration, on the Welcome page, click Next.
If you accept the terms and conditions stated in the user license agreement, click I accept the terms in the license agreement, and then click Next.
Type your customer details, and then click Next.
On the Setup Scenarios page, do one of the following:
If you want to install ISA Server services and the Configuration Storage server, select Install both ISA Server services and Configuration Storage server, and then click Next.
If you want to install only the Configuration Storage server, select Install Configuration Storage Server, and then click Next.
On the Component Selection page, you can review the settings, and then click Next.
On the Enterprise Membership page, select Create a New Enterprise if you are creating a new enterprise, or Create a replica of the enterprise configuration if you are creating a replicate Configuration Storage server. Click Next. Do one of the following:
If you are creating a new enterprise, on the New Enterprise Warning page, click Next. This page warns you not to install more than one enterprise. Because you are creating a new enterprise, you can ignore the warning. On the Create a New Enterprise page, provide a name for the enterprise. Optional: provide a description of the enterprise. Click Next.
If you are creating a replica of the enterprise configuration, on the Locate Configuration Storage Server page, provide the fully qualified domain name of the Configuration Storage server that you want to replicate, or click Browse to locate the server on the network. Click Next.
If you are creating a replicate Configuration Storage server, the next wizard page will be the ISA Server Configuration Replicate Source page. This page provides options for the initial ISA Server replication, which may take a long time over a slow link. If you are replicating over a slow link, you may want to choose to replicate from a Windows backup file. For information about creating a backup file, see Creating and Restoring a Backup File in this document. Click Next.
On the Enterprise Deployment Environment page, you have the option of installing a digital certificate to enable encrypted communication between the Configuration Storage server and the ISA Server firewall computers. All communication between firewall computers and Configuration Storage servers in a single domain is encrypted. We recommend that you use this option when your ISA Server firewall computers are not in the same domain as your Configuration Storage server, or if the firewall computers are in a workgroup. Click Next.
If you are installing ISA Server services, the next page will be the Internal Network page. Specify the IP address range that will constitute the Internal network for this array. Select Add, and then click Add Adapter to define the Internal network with the IP addresses associated with the internal network adapter. Click Next.
If you are installing ISA Server services, the next page will be the Firewall Client Connection Settings page. On this page you can select which Firewall clients will be allowed to connect. Click Next.
If you are installing ISA Server services, the next page will be the Services Warning page. Read the warning, and then click Next.
Because you are installing on a domain controller, you will see the Configuration Storage Server Service Account page. Provide the credentials of the user who is not a domain administrator.
On the Ready to Install the Program page, click Install to begin the installation.
After the installation is complete, select Invoke ISA Server Management when the wizard closes, and then click Finish.
You will be prompted to restart the computer. Click Yes to restart the computer.
After installation, log on to the Configuration Storage server as a domain administrator.
Open a command prompt, click Start, click Run, and type cmd.
In the Program Files\Microsoft ISA Server\ADAMData folder, locate the dnsdomain.bat file. dnsdomain is the DNS domain name of the computer on which ADAM is running.
Type dnsdomain to run the file.
Note: The dnsdomain.bat file appears in the directory approximately one minute after ADAM installation is complete.