Use your extra license seats from your existing Trend Micro subscription to activate Trend Micro products, including Mobile Security, WiFi Protection, and Trend Micro Security for Edge.
You can only create a Trend Micro account when you register a Trend Micro program. There is no way to create an account without activating an app. If you are trying to activate the Trend Micro product without an existing Trend Micro Account, select the option to Create an Account instead of Sign-in.