Why Windows discovery is not populating MAC Addresses field on CI formSummaryThis behavior is by design. We do not populate the mac_address in the CMDB form [Computer] by default. This is kind of legacy field due to the following factA computer itself does not have a MAC address, but a network card and networking device have a mac_address. For this reason all the MAC addresses are populated in cmdb_ci_network_adapter table(Network Adater Tab on CI form)You may create a business rule to populate the mac address in the CMDB field, but there is only 1 field for the mac_address. It's possible that the computer can have more than one network adaptor.Below business rule is just for some idea to populate MAC address in CI form--example business rule on the cmdb_ci_network_adaptor function onAfter(current, previous) {//This function will be automatically called when this rule is processed.var gr = new GlideRecord('cmdb_ci');gr.get(current.cmdb_ci.sys_id);gr.mac_address = current.mac_address;gr.update();}