If you see this notification, please have your dock serviced. In case the fan fails to operate, a notification will appear in Chrome OS. Dock fan error messages-The Dell WD19/WD19TB Docking Station has a fan on the inside.MAC address pass through-The Dell Latitude 5400 Chromebook Enterprise and Dell Latitude 5300 2-in-1 Chromebook Enterprise allows the admin to choose the MAC address that the Dell WD19 / WD19TB Docking Station uses when it’s connected to these devices.The docking station will not function at this time. The update process can take up to 60 seconds. Update Dock Firmware-The Dell Latitude 5400 Chromebook Enterprise and Dell Latitude 5300 2-in-1 Chromebook Enterprise devices will provide firmware updates to the compatible docking stations.Here are the some additional features available with the docking stations listed above: Dell Thunderbolt Docking Station - WD19TB (Only in USB Type-C compatible mode).The Dell Latitude 5400 Chromebook Enterprise and Dell Latitude 5300 2-in-1 Enterprise Chromebooks have some additional features for the following Dell docking stations: