Hi, We have an Enterprise license for the 3CX Phone System since the early days. We also keep upgrade insurance with the license. Since upgrading to v10, the license no longer enables all enterprise features. The upgrade from v9 to v10 also became very unstable. We have since rebuild the PBX machine with a fresh copy of the v10 software. Althogh the 3CX Phone System accepts the key and register, the Enterprise features are not available. Have anyone experienced similar behaviour? Below is an image of the License screen. Thanks, Juan.