Management of network node configurations is designed under the assumption that there is only one operator. However, in future, several operators will be able to share the same network node. In this case, it is not desirable that the configuration of a network node is visible to and editable by all operators sharing the network node. The method, system and network node of the invention, wherein the network node configuration (K) comprises at least one common configuration part (Com) and at least one operator-specific configuration part (OC1, OC2, OC3) whose management right is restricted to only some of the operators sharing the network node, provide the network node with properties that all operators cannot edit.