[grace-baker Hexnode 28 January 2020 grace-baker Moderator]

Hey, Thanks for reaching out to us.

Please navigate to Reports tab > Device Reports > Inactive Devices. Click on the edit icon and enable the option ‘Phone Number’. Click ‘OK‘. The list of inactive devices along with the phone numbers will now be displayed beneath the Inactive Devices.
You can export this report as a CSV/PDF file by clicking on the ‘Export’ button at the top of the page.

Kindly use the help link for a more info on ‘Reports’.

Cheers!
Grace Baker
Hexnode MDM