Advanced MID Server configuration There are several advanced options available for you to customize and configure the MID Server. Install and uninstall Nmap on a MID ServerIf you decide to use credential-less Discovery in your network, install Nmap on each Windows MID Server that you want to use for this purpose. Self-hosted customers whose network security does not permit downloads from install.service-now.com must use a specific manual process to install and configure Nmap.Enable script file synchronization for Windows enhanced securityWindows Internet Explorer enhanced security blocks downloaded files that it determines are potentially dangerous.Configure a MID Server for alert aggregation and RCATo enable the Event Management alert aggregation and root cause analysis (RCA) capability, configure at least one dedicated MID Server with the ServiceAnalytics as a supported application, and with the RCA capability. To ensure uninterrupted services, it is recommended that you also configure a failover MID Server cluster for RCA. MIDSystem methodsMIDSystem variables (referred to by the variable name ms.) provide a variety of methods to get information about the MID Server .Synchronize a JAR file to MID ServersYou can upload a JAR file to an instance and synchronize it to all MID Servers, or write custom probes that use the synchronized JAR file.Set the MID Server JVM memory sizeThe MID Server starts with a default JVM memory allocation, but you can modify this setting in the configuration file.Set MID Server thread useIf the MID Server is running on a host containing many other programs that must compete for CPU time, fewer threads than the default of 25 might be necessary. ECC queue retry policyDefine retry policies for outbound Web Services that are executed via the ECC Queue table.