I have a Dell Latitude E7440 laptop that supposedly supports a bluetooth mouse without a dongle.  I've tried two different mice that don't require a dongle, but neither would show up in the pairing list.  I do know how to pair bluetooth devices, but never had this problem where the device doesn't show up in the pairing list.  I'm currently using a mouse with a dongle, but I'd like to free up the usb port. Any ideas?