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Application requirements

If you will be protecting an application, the core Double-Take Availability requirements apply. In addition, you must meet the application requirements below.

Server and network configuration—Application protection requires the following server and network requirements.

The application program files must be installed in the same location on the source and target.
The drive letter(s) where the applications stores its data on the source must be the same on the target.
Single-label DNS domain names (those without a suffix such as .com, .corp, .net) are not supported.
In environments where the FIPS security policy is enabled, you must use impersonation, which requires the following.
The user running Double-Take Availability must have all appropriate rights to update the domain (that is, only impersonation is supported).
You must manually verify DNS rights by running the DFO utility with the /test parameter.
Microsoft Server Core 2008 R2 is only supported for file server protection. It is not supported for Exchange or SQL protection.

Verification—If you want to use the Target Data Verification feature to confirm the integrity of your Exchange or SQL data on the target, you will need to install the Volume Shadow Copy Service SDK in the \windows\system32 directory on the target. You can download the SDK from the Microsoft website. Additionally, your Exchange version must be Exchange 2003 with service pack 1 or later.
Application Manager Console—The following requirements and limitations apply to the Application Manager Console.

Ideally, you should run the console from a client machine or from the target.
Do not run the Application Manager Console from a domain controller.
If you are using a cluster configuration and run the Application Manager Console from a workstation operating system, you must have the Windows Administration Pack installed in order to have the cluster components installed on the workstation operating system.
The Application Manager console requires Microsoft .NET version 3.5 Service Pack 1. These versions are not included in the .NET version 4.0 release. Therefore, even if you have .NET version 4.0 installed, you will also need version 3.5.1. You can install this version from the Double-Take Availability CD, via a web connection during the Double-Take Availability installation, or from a copy you have obtained manually from the Microsoft web site.

Applications—In addition to these general application requirements, you must also meet the requirements for the application you are protecting. See Exchange, SQL, or File Server for those requirements.