Customization option does not show up when virtual machine is deployed from an OVF template in content library
VMware vCenter Server 6.0.x
VMware vCenter Server 6.7.x
This is working as designed as content library API doesn't provide API support to update the GOSC spec
This is an expected behaviour when using content library. Use flex client when deploying from content library and Edit the customization template during "customize Guest OS" option in deploy wizard.