This post has reference to AMTMitelCRE 1.6.5.13+
The new version of AMETHYST will record all licensed device on the MBG(connected status) and reject recordings for those not on the AMETHYST Device list. For more details see forum post:
AMTMitelCRE 1.5.6+ and AMETHYST licensing
Version 1.7 of the CRE has a facility to configure the list of licensed devices through the web admin.
If option 125 in the DHCP on your Mitel PABX is enabled to connect on the MBG,
the phone will auto configure and be added to the MBG as recorded devices in connected status.
The devices will be recorded and recordings sent to AMETHYST. All extensions not on the AMETHYST Device List will reject.
Extension on the MBG that should not be recorded, should be removed as it uses resources on the CRE and space on the AMETHYST server.