be overridden by customizing the <code>proxyMetadata</code> field of the <a href=/v1.20/docs/reference/config/istio.mesh.v1alpha1/#ProxyConfig>proxy configuration</a>. For example:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>proxyMetadata:
  SECRET_TTL: 48h
</code></pre><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.20/img/icons.svg#callout-tip"/></svg></div><div class=content>Values over 90 days will not be accepted.</div></aside></d