An engineer must enable onboarding of on-premises devices by using activation to a Cisco UCM...

The engineer must set the Enable Activation Code enterprise parameter to True. This will enable the use of activation codes for onboarding on-premises devices to a Cisco UCM server. The other options are not necessary to complete the configuration.

Here are the steps to complete the configuration:

Log in to the Cisco Unified Communications Manager (CUCM) Administration interface.

Go to System > Enterprise Parameters.

Set the Enable Activation Code enterprise parameter to True.

Click Save.

The activation code onboarding feature is now enabled. You can use it to onboard new phones to the CUCM server.