mvn archetype:create -DgroupId=com.example -DartifactId=sample

…
[DEBUG] Using connector BasicRepositoryConnector with priority 0.0 for https://repo.maven.apache.org/maven2 via [社内プロキシサーバ名]:[プロキシ用ポート] with username=[社内プロキシアカウント名], password=***
…（省略）
[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (https://repo.maven.apache.org/maven2): Error transferring file: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" from https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml with proxyInfo ProxyInfo{host='[社内プロキシサーバ名]', userName='null', port=[プロキシ用ポート], type='https', nonProxyHosts='null'}
org.eclipse.aether.transfer.MetadataTransferException: Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (https://repo.maven.apache.org/maven2): Error transferring file: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" from https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml with proxyInfo ProxyInfo{host='[社内プロキシサーバ名]', userName='null', port=[プロキシ用ポート], type='https', nonProxyHosts='null'}

（↑上記のような407エラーが、大量に発生。）

<settings>
  <proxies>
    <proxy>
      <id>proxy-http</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>[社内プロキシサーバ名]</host>
      <port>[プロキシ用ポート]</port>
      <username>[社内プロキシアカウント名]</username>
      <password>[社内プロキシパスワード]</password>
    </proxy>
    <proxy>
      <id>proxy-https</id>
      <active>true</active>
      <protocol>https</protocol>
      <host>[社内プロキシサーバ名]</host>
      <port>[プロキシ用ポート]</port>
      <username>[社内プロキシアカウント名]</username>
      <password>[社内プロキシパスワード]</password>
    </proxy>
  </proxies>
</settings>

mvn archetype:create -DgroupId=com.example -DartifactId=sample