Releasing Apple Apps licenses will dissociate an application on a device with a license that was given from the associated Apple Business/School Manager account.
Once an application license is released the device will no longer receive updates.
If Apple Apps Uninstall is enabled in Account > Integrations, releasing the license will also uninstall the app from the device. Otherwise, the application will remain on the device after the license is released.
To release a license, navigate to Policies > policy where Apps & Books is configured > Integrations & Settings > Apple Apps:
In the Apple Apps tab, you will see a table of all the applications with licenses in your Apple Business/School Manager account. This table provides insightful information such as how many licenses are on the account in total, assigned, and available.
By clicking on the Assigned number for a particular application, you will see the licenses associated with the device serial numbers of the devices in the policy. By clicking release, the license associated with that device serial number will no longer be associated with that device and will become available: