we have a problem connection IPhone Devices to emm. The Profile Mobile Device Management can be installed, but the Enterprise Activation fails. In teh event log there is a failuer which states apple push remote certificate chain error. MDM Certificate is installed. Tested it with a fully functional other MDM Certificate which works on another EMM Server. Ports 2195 and 2196 are open for pushing config. Has someone else seen such a behaviour and solved it.