Configures a global shared secret that is used for all dynamic authorization clients that do not have an individual shared secret key configured. If agentDynamicAuthorizationEncryptServerKey is set to true, then the length of this string has to be exactly 256 else it can be 1-128.
Sources for this description
LANCOM official release MIBsLANCOM MIB copies (LibreNMS/Observium Community)