Azure Command Line Interface 2.0:

Use the below command to create an Activity Log Alert for Create policy assignment.

az account get-access-token –query {subscription:subscription,accessToken:accessToken} –out tsv | xargs -L1 bash -c ‘ curl – X PUT – H Authorization : Bearer $1 – H Content – Type : application / json https :// management.azure.com / subscriptions / $0 / resourceGroups /& lt;Resource_Group_To Create_Alert_In & gt;/ providersmicrosoft.insights / activityLogAlerts /& lt;Unique_Alert_Name & gt;?api – version = 2017 – 04 – 01 – d@input.json ‘ az account get-access-token –query {subscription:subscription,accessToken:accessToken} –out tsv | xargs -L1 bash -c ‘ curl – X PUT – H Authorization : Bearer $1 – H Content – Type : application / json https :// management.azure.com / subscriptions / $0 / resourceGroups /& lt;Resource_Group_To Create_Alert_In & gt;/ providersmicrosoft.insights / activityLogAlerts /& lt;Unique_Alert_Name & gt;?api – version = 2017 – 04 – 01 – d@input.json ‘

Where input.json contains the Request body JSON data as mentioned below.

{location:Global,tags:{},properties:{scopes:[/subscriptions/<Subscription_ID>],enabled:true,condition:{allOf:[{containsAny:null,equals:Administrative,field:category},{containsAny:null,equals:Microsoft.Authorization/policyAssignments/write,field:operationName}]},actions:{actionGroups:[{actionGroupId:/subscriptions/<Subscription_ID>/resourceGroups/<Resource_Group_For_Alert_Group>/providers/microsoft.insights/actionGroups/<Alert_Group>,webhookProperties:null}]}}}

Configurable Parameters for command line:

1. <Resource_Group_To Create_Alert_In>
2. <Unique_Alert_Name>

Configurable Parameters for input.json :

1. <Subscription_ID> in scopes
2. <Subscription_ID> in actionGroupId
3. <Resource_Group_For_Alert_Group> in actionGroupId
4. <Alert_Group> in actionGroupId

References:

1. https://azure.microsoft.com/en-us/updates/classic-alerting-monitoring-retirement
2. https://docs.microsoft.com/en-in/azure/azure-monitor/platform/alerts-activity-log
3. https://docs.microsoft.com/en-in/rest/api/monitor/activitylogalerts/createorupdate
4. https://docs.microsoft.com/en-in/rest/api/monitor/activitylogalerts/listbysubscriptionid