MODIFY-AUM-CheckUpdatesPolicyAssignment.json

{
    "$schema": "https://schema.management.azure.com/schemas/2019-08-01/managementGroupDeploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "topLevelManagementGroupPrefix": {
            "type": "string",
            "metadata": {
                "description": "Provide the ESLZ company prefix to the intermediate root management group containing the policy definitions."
            }
        },
        "enforcementMode": {
            "type": "string",
            "allowedValues": [
                "Default",
                "DoNotEnforce"
            ],
            "defaultValue": "Default"
        },
        "nonComplianceMessagePlaceholder": {
            "type": "string",
            "defaultValue": "{enforcementMode}"
        },
        "assessmentMode": {
            "type": "String",
            "metadata": {
                "displayName": "Assessment mode",
                "description": "Assessment mode for the machines."
            },
            "allowedValues": [
                "ImageDefault",
                "AutomaticByPlatform"
            ],
            "defaultValue": "AutomaticByPlatform"
        },
        "locations": {
            "type": "Array",
            "metadata": {
                "displayName": "Machines locations",
                "description": "The list of locations from which machines need to be targeted.",
                "strongType": "location"
            },
            "defaultValue": []
        },
        "tagValues": {
            "type": "Object",
            "metadata": {
                "displayName": "Tags on machines",
                "description": "The list of tags that need to matched for getting target machines."
            },
            "defaultValue": {}
        },
        "tagOperator": {
            "type": "String",
            "metadata": {
                "displayName": "Tag operator",
                "description": "Matching condition for resource tags"
            },
            "allowedValues": [
                "All",
                "Any"
            ],
            "defaultValue": "Any"
        },
        "scope": {
            "type": "String",
            "metadata": {
                "displayName": "Scope",
                "description": "Scope of the policy assignment"
            }
        }
    },
    "variables": {
        "policyDefinitions": {
            "vmCheckUpdates": "[concat('/providers/Microsoft.Management/managementGroups/', parameters('topLevelManagementGroupPrefix'), '/providers/Microsoft.Authorization/policySetDefinitions/Deploy-AUM-CheckUpdates')]"
        },
        "policyAssignmentNames": {
            "vmCheckUpdates": "Enable-AUM-CheckUpdates",
            "description": "Configure auto-assessment (every 24 hours) for OS updates. You can control the scope of assignment according to machine subscription, resource group, location or tag. Learn more about this for Windows: https://aka.ms/computevm-windowspatchassessmentmode, for Linux: https://aka.ms/computevm-linuxpatchassessmentmode.",
            "displayName": "Configure periodic checking for missing system updates on azure virtual machines and Arc-enabled virtual machines."
        },
        "nonComplianceMessage": {
            "message": "Periodic checking of missing updates {enforcementMode} be enabled.",
            "Default": "must",
            "DoNotEnforce": "should"
        },
        "rbacVmContributor": "9980e02c-c2be-4d73-94e8-173b1dc7cf3c",
        "rbacConnectedMachineResourceAdministrator": "cd570a14-e51a-42ad-bac8-bafd67325302",
        "rbacManagedIdentityOperator": "f1a07417-d97a-45cb-824c-7a7467783830",
        "roleAssignmentNames": {
            "roleAssignmentNameVmContributor": "[guid(concat(parameters('toplevelManagementGroupPrefix'),variables('policyAssignmentNames').vmCheckUpdates,'-1',parameters('scope')))]",
            "roleAssignmentNameConnectedMachineResourceAdministrator": "[guid(concat(parameters('toplevelManagementGroupPrefix'),variables('policyAssignmentNames').vmCheckUpdates,'-2',parameters('scope')))]",
            "roleAssignmentNameManagedIdentityOperator": "[guid(concat(parameters('toplevelManagementGroupPrefix'),variables('policyAssignmentNames').vmCheckUpdates,'-3',parameters('scope')))]"
        }
    },
    "resources": [
        {
            "type": "Microsoft.Authorization/policyAssignments",
            "apiVersion": "2022-06-01",
            "name": "[variables('policyAssignmentNames').vmCheckUpdates]",
            "location": "[deployment().location]",
            "identity": {
                "type": "SystemAssigned"
            },
            "properties": {
                "description": "[variables('policyAssignmentNames').description]",
                "displayName": "[variables('policyAssignmentNames').displayName]",
                "policyDefinitionId": "[variables('policyDefinitions').vmCheckUpdates]",
                "enforcementMode": "[parameters('enforcementMode')]",
                "nonComplianceMessages": [
                    {
                        "message": "[replace(variables('nonComplianceMessage').message, parameters('nonComplianceMessagePlaceholder'), variables('nonComplianceMessage')[parameters('enforcementMode')])]"
                    }
                ],
                "parameters": {
                    "assessmentMode": {
                        "value": "[parameters('assessmentMode')]"
                    },
                    "locations": {
                        "value": "[parameters('locations')]"
                    },
                    "tagValues": {
                        "value": "[parameters('tagValues')]"
                    },
                    "tagOperator": {
                        "value": "[parameters('tagOperator')]"
                    }
                }
            }
        },
        {
            "type": "Microsoft.Authorization/roleAssignments",
            "apiVersion": "2022-04-01",
            "name": "[variables('roleAssignmentNames').roleAssignmentNameVmContributor]",
            "dependsOn": [
                "[resourceId('Microsoft.Authorization/policyAssignments', variables('policyAssignmentNames').vmCheckUpdates)]"
            ],
            "properties": {
                "principalType": "ServicePrincipal",
                "roleDefinitionId": "[concat('/providers/Microsoft.Authorization/roleDefinitions/', variables('rbacVmContributor'))]",
                "principalId": "[toLower(reference(concat('/providers/Microsoft.Authorization/policyAssignments/', variables('policyAssignmentNames').vmCheckUpdates), '2019-09-01', 'Full' ).identity.principalId)]"
            }
        },
        {
            "type": "Microsoft.Authorization/roleAssignments",
            "apiVersion": "2022-04-01",
            "name": "[variables('roleAssignmentNames').roleAssignmentNameConnectedMachineResourceAdministrator]",
            "dependsOn": [
                "[resourceId('Microsoft.Authorization/policyAssignments', variables('policyAssignmentNames').vmCheckUpdates)]"
            ],
            "properties": {
                "principalType": "ServicePrincipal",
                "roleDefinitionId": "[concat('/providers/Microsoft.Authorization/roleDefinitions/', variables('rbacConnectedMachineResourceAdministrator'))]",
                "principalId": "[toLower(reference(concat('/providers/Microsoft.Authorization/policyAssignments/', variables('policyAssignmentNames').vmCheckUpdates), '2019-09-01', 'Full' ).identity.principalId)]"
            }
        },
        {
            "type": "Microsoft.Authorization/roleAssignments",
            "apiVersion": "2022-04-01",
            "name": "[variables('roleAssignmentNames').roleAssignmentNameManagedIdentityOperator]",
            "dependsOn": [
                "[resourceId('Microsoft.Authorization/policyAssignments', variables('policyAssignmentNames').vmCheckUpdates)]"
            ],
            "properties": {
                "principalType": "ServicePrincipal",
                "roleDefinitionId": "[concat('/providers/Microsoft.Authorization/roleDefinitions/', variables('rbacManagedIdentityOperator'))]",
                "principalId": "[toLower(reference(concat('/providers/Microsoft.Authorization/policyAssignments/', variables('policyAssignmentNames').vmCheckUpdates), '2019-09-01', 'Full' ).identity.principalId)]"
            }
        }
    ],
    "outputs": {}
}