Is there any way to have the auto-generated task assignment emails point to a Sites link instead of a Tempo link?

You could disable all emails as recommended above. And to avoid doing a very large modification to all of your process models, you could instead build an always-on process that runs a task report looking for newly created tasks, and sends out a notification every 1 minute for those newly created tasks. This way you only need to build it once, and it will only need minor enhancements to add more tasks to the report when you change your applications.

You could disable all emails as recommended above. And to avoid doing a very large modification to all of your process models, you could instead build an always-on process that runs a task report looking for newly created tasks, and sends out a notification every 1 minute for those newly created tasks. This way you only need to build it once, and it will only need minor enhancements to add more tasks to the report when you change your applications.