It may take several minutes for your confirmation email to arrive from My Total Connect Comfort. Check your junk or spam mailbox for the activation email. The activation email will come from firstname.lastname@example.org. If you still cannot find the activation email you may need to use an alternate email account to register your thermostat. If you register with an alternate email and are still unable to find the activation email, please call Honeywell's Customer Care at 1-855-733-5465.