Force 'prompt for confirmation' for certain clients

We are deploying TeamViewer hosts on close to 300 computers. In most cases, it is OK for us, as support folks, to just take over their computers without asking permission. This is helpful when they need help when they are away from their desks, for example. For them, we connect using password.

We have a couple users, mostly in the financial and HR departments that want to be prompted before we are let on their systems. Basically, the 'prompt for confirmation' method.

We have to remember which PC is those users so that we don't accidentaly login without the prompt. Is there a configuration setting to set on the host or at the group level that would allow me to only connect via 'prompt for confirmation'?

Thanks!