An ECD, or Enterprise Connected Device, is any device that interacts with, holds or processes an organisations data. So that includes smartphones, tablets, laptops, desktops, NAS, servers, etc.
The National Cyber Security Centre (“NCSC”) has just published new guidance on the use of ECD’s and n assessment of the current cyber security threat to UK organisations using them.
It should help inform your cyber security strategy and is available for free download at https://www.ncsc.gov.uk/report/organisational-use-of-enterprise-connected-devices