upgrade-notes/#multicluster-global-stub-domain-deprecation>previously deprecated</a> <code>.global</code> stub domain for multicluster will no longer work.</p><p>This change can be temporarily disabled if desired by setting the environment variable <code>PILOT_ENABLE_LEGACY_AUTO_PASSTHROUGH=true</code> in Istiod. However, this is strongly discouraged, as it negates the fix to <a href=/v1.22/news/security/istio-security-2021-006/>ISTIO-SECURITY-2021-006</a>.</p><p>Please follow the <a href=/v1.22/docs/setup/