Conditional Access - A Conditional Access policy was deleted

// A Conditional Access policy was deleted.
AuditLogs
| where OperationName in ("Delete conditional access policy")
| extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
| extend accountName = tostring(split(modifiedBy, "@")[0])
| extend upnSuffix = tostring(split(modifiedBy, "@")[1])
| project
    TimeGenerated,
    OperationName,
    policy = TargetResources[0].displayName,
    modifiedBy,
    accountName,
    upnSuffix,
    result = Result,
    oldPolicy = TargetResources[0].modifiedProperties[0].oldValue
| order by TimeGenerated desc

suppressionEnabled: false
description: A Conditional Access policy was deleted from Entra ID.
kind: Scheduled
tactics:
- DefenseEvasion
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    groupByEntities: []
    reopenClosedIncident: false
    lookbackDuration: PT1H
    matchingMethod: AllEntities
    groupByCustomDetails: []
    groupByAlertDetails: []
  createIncident: true
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/Conditional Access - A Conditional Access policy was deleted.yaml
severity: Low
name: Conditional Access - A Conditional Access policy was deleted
suppressionDuration: 5h
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerThreshold: 0
queryPeriod: 5m
query: |
  // A Conditional Access policy was deleted.
  AuditLogs
  | where OperationName in ("Delete conditional access policy")
  | extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
  | extend accountName = tostring(split(modifiedBy, "@")[0])
  | extend upnSuffix = tostring(split(modifiedBy, "@")[1])
  | project
      TimeGenerated,
      OperationName,
      policy = TargetResources[0].displayName,
      modifiedBy,
      accountName,
      upnSuffix,
      result = Result,
      oldPolicy = TargetResources[0].modifiedProperties[0].oldValue
  | order by TimeGenerated desc  
relevantTechniques:
- T1562.007
id: 2e96fa64-ac4d-4c92-b79e-e9c54b5d8230
queryFrequency: 5m
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: accountName
    identifier: Name
  - columnName: upnSuffix
    identifier: UPNSuffix
triggerOperator: gt
version: 1.0.1