-VMs must be enabled for trusted launch together with secure boot and virtual TPM. Upgrading VMs from standard security to trusted launch isn't supported. Many VMs are affected by this requirement. This is because before [June 28, 2023](https://techcommunity.microsoft.com/t5/azure-confidential-computing/announcing-trusted-launch-as-default-in-azure-portal/ba-p/3854872), trusted launch wasn't the default security type option when you created a VM in the Azure portal. Also, when Windows 11 was released, trusted launch wasn't available as a feature in Windows Azure.
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