In the UMS, go to UMS Administration > Global Configuration > Licenses > Thin Client Licenses.
With UMS version 5.06.100 or older, the menu path is System > License Management.
Click Export Unit ID list.
In the Export Unit ID list wizard, select the filter that is appropriate for your purpose. For instance, if all unlicensed devices registered in the UMS are UD Pocket devices and you want to license them all, select Export all unlicensed Unit IDs.
A list of all devices that will be included in the list is shown.