Netskope - Repeated or Critical Policy Violations

Original query, unchanged.

let violationThreshold = 5;
NetskopeWebTransactions_CL
| where TimeGenerated > ago(1h)
| where isnotempty(CsUsername)
| where isnotempty(XPolicyAction) and isnotempty(XPolicyName)
| where XPolicyAction =~ 'block' or XPolicyAction =~ 'alert'
| summarize 
    ViolationCount = count(),
    Policies = make_set(XPolicyName),
    PolicyActions = make_set(XPolicyAction),
    Apps = make_set(XCsApp),
    Hosts = make_set(CsHost),
    Activities = make_set(XCsAppActivity),
    BlockCount = countif(XPolicyAction =~ 'block'),
    AlertCount = countif(XPolicyAction =~ 'alert'),
    FirstViolation = min(TimeGenerated),
    LastViolation = max(TimeGenerated)
    by CsUsername, XCCountry, XCDevice
| where ViolationCount >= violationThreshold or BlockCount > 0
| extend ViolationSeverity = case(
    BlockCount > 10, 'Critical',
    BlockCount > 5, 'High',
    ViolationCount > 20, 'High',
    ViolationCount > 10, 'Medium',
    'Low')
| project 
    TimeGenerated = LastViolation,
    User = CsUsername,
    TotalViolations = ViolationCount,
    BlockedAttempts = BlockCount,
    AlertedActions = AlertCount,
    ViolatedPolicies = Policies,
    PolicyActions,
    ApplicationsInvolved = Apps,
    TargetHosts = Hosts,
    Activities,
    Country = XCCountry,
    Device = XCDevice,
    ViolationSeverity,
    FirstOccurrence = FirstViolation,
    LastOccurrence = LastViolation