I want to schedule tasks using multiple resources. The work task is fixed and multiple resources are allocated to the tasks.

I want to auto-schedule the tasks, however, when 1 resource is unavailable (i.e. through using exceptions in 'change working time'), I want MS project to automatically delay the task until ALL resources are available to complete the task.

i.e. I don't want MS project allocate the task to the 1 resource nor do I want the duration extended. Can anyone help?