Abstract: A method, a system and a computer program product for dynamically managing address spaces performed by an OPC UA server. The OPC UA server is part of an OPC VA architecture network including a plurality of OPC UA servers, a plurality of OPC UA clients and a load balancer configured to redirect communication between the plurality of OPC UA servers and the plurality of OPC UA clients. The method includes receiving an incoming OPC UA client service request, checking if the address space is instantiated at the OPC UA server, and if the address space is not instantiated, dynamically creating the requested one of the plurality of address spaces at the OPC UA serve. A service response to the OPC UA client using the instantiated address space.