Microsoft Message Queuing or MSMQ is a Message Queue implementation developed by Microsoft and deployed in its Windows Server operating systems.
This SonicWALL signature identifies legitimate MSMQ traffic. This detection is based on a UUID found during an RPC call. Due to the lack of documentation, it is not always possible to determine the exact version of an application based on UUIDs. Please see the "Microsoft RPC End Point Mapper" signature(s) for more information.