Disclosed aspects relate to communication management in a social networking environment. A source communication with respect to a topic may be received by the social networking environment. In response to receiving the source communication, a response communication by a first user may be detected. The response communication may relate to the topic. Using a set of topic expertise data for the first user with respect to the topic, a trust factor for the user with respect to the topic may be determined. Based on the trust factor, a communication arrangement may be established in the social networking environment.