preinstalled.json

{
    "$schema": "https://www.ookii.org/Link/AnswerFileJsonSchema-2.0",
    "JoinDomain": {
        "$type": "Credential",
        "Domain": "mydomain",
        "Credential": {
            "UserAccount": "mydomain\\user",
            "Password": "password"
        },
        "OUPath": "OU=Computers",
        "DomainAccounts": [
            {
                "DomainUser": "user",
                "Group": "Administrators"
            },
            {
                "DomainUser": "otherdomain\\user2",
                "Group": "Users;Hyper-V Administrators"
            }
        ]
    },
    "ComputerName": "TestComputer",
    "EnableRemoteDesktop": true,
    "EnableServerManager": false,
    "LocalAccounts": [
        {
            "UserName": "localuser",
            "Password": "password"
        }
    ],
    "AutoLogon": {
        "Credential": {
            "UserAccount": "domain\\user",
            "Password": "password"
        },
        "Count": 1
    },
    "DisplayResolution": "1280,1024",
    "Language": "en-US",
    "ProductKey": "ABCDE-12345-ABCDE-12345-ABCDE",
    "ProcessorArchitecture": "amd64",
    "TimeZone": "Pacific Standard Time",
    "FirstLogonCommands": [
        "\\\\server\\share\\script.cmd"
    ],
    "FirstLogonScripts": [
        "\\\\server\\share\\script.ps1 -SomeParameter"
    ]
}