Control: Azure > CIS v2.0 > 05 - Logging and Monitoring > 5.01 - Configuring Diagnostic Settings

The Azure Diagnostic Settings capture control/management activities performed on a subscription or Azure AD Tenant. By default, the Azure Portal retains activity logs only for 90 days. The Diagnostic Settings define the type of events that are stored or streamed and the outputs—storage account, log analytics workspace, event hub, and others. The Diagnostic Settings, if configured properly, can ensure that all logs are retained for longer duration. This section has recommendations for correctly configuring the Diagnostic Settings so that all logs captured are retained for longer periods.