Traffic Analytics requires the following prerequisites: A Network Watcher enabled subscription. Network Security Group (NSG) flow logs enabled for the NSGs you want to monitor. An Azure Storage account, to store raw flow logs. An Azure Log Analytics workspace, with read and write access. https://docs.microsoft.com/en-us/azure/network-watcher/traffic-analytics-faq#what-are-the- prerequisites-to-use-traffic-analytics-