Add VM to Recovery Services Vault in different Resource Group - azure

Question

I'm fairly new to Azure ARM Templates so any help it's appreciated. I'm trying to deploy various vm's and at the same time configure the backup but I'm getting this error:
"InvalidTemplate","message":"Deployment template validation failed: 'The template resource '[concat(parameters('VMNames')[copyIndex()], '-' , 'BackupIntent')]' at line '195' and column '9' is not valid: The language expression property '0' can't be evaluated.
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"VnetResourceGroup": {
"type": "String"
},
"VnetName": {
"type": "String"
},
"SubnetName": {
"type": "String"
},
"OSVersion": {
"defaultValue": "2016-Datacenter",
"allowedValues": [
"2016-Datacenter",
"2019-Datacenter",
"2022-datacenter",
"2022-datacenter-g2",
"2019-datacenter-gensecond",
"2016-datacenter-gensecond"
],
"type": "String",
"metadata": {
"description": "The Windows version for the VM. This will pick a fully patched image of this given Windows version."
}
},
"virtualMachineSize": {
"type": "String"
},
"AdminUsername": {
"defaultValue": "evtcladm",
"type": "String",
"metadata": {
"description": "Admin username for VM"
}
},
"AdminPassword": {
"type": "SecureString",
"metadata": {
"description": "Admin password for VM"
}
},
"backupVaultName": {
"defaultValue": "vault-corenet-01",
"allowedValues": [
"vault-corenet-01",
"vault-cps-01",
"Vault-Multi-VM",
"Vault-RecoveryMultiVM",
"vault-evt-cps-chile"
],
"type": "String",
"metadata": {
"description": "Recovery Vault to be used for backup"
}
},
"BackupPolicy": {
"defaultValue": "FASE1",
"type": "String"
},
"RSVResourceGroup": {
"type": "String"
},
"backupFabricName": {
"defaultValue": "Azure",
"type": "String"
},
"VMNames": {
"type": "String"
},
"numberOfInstances": {
"type": "Int",
"metadata": {
"description": "Number of VMs to deploy"
}
}
},
"variables": {
"v2Vm": "vm;iaasvmcontainerv2;",
"maxZones": 3,
"nicSuffix": "NIC",
"networkInterfaceName": "[concat(parameters('VMNames'), variables('nicSuffix'))]"
},
"resources": [
{
"type": "Microsoft.Network/networkInterfaces",
"apiVersion": "2016-03-30",
"name": "[concat(variables('networkInterfaceName'), copyindex(1))]",
"location": "[resourceGroup().location]",
"properties": {
"ipConfigurations": [
{
"name": "ipconfig1",
"properties": {
"privateIPAllocationMethod": "Dynamic",
"subnet": {
"id": "[resourceId(parameters('VnetResourceGroup'),'Microsoft.Network/virtualNetworks/subnets',parameters('VnetName'),parameters('subnetName'))]"
}
}
}
]
},
"copy": {
"name": "nicLoop",
"count": "[parameters('numberOfInstances')]"
}
},
{
"type": "Microsoft.Compute/virtualMachines",
"apiVersion": "2016-04-30-preview",
"name": "[concat(parameters('VMNames'), copyIndex(1))]",
"location": "[resourceGroup().location]",
"dependsOn": [
"nicLoop"
],
"zones": [
"[string(add(mod(copyIndex(0), variables('maxZones')), 1))]"
],
"properties": {
"hardwareProfile": {
"vmSize": "[parameters('virtualMachineSize')]"
},
"osProfile": {
"computerName": "[concat(parameters('VMNames'), copyIndex(1))]",
"adminUsername": "[parameters('AdminUsername')]",
"adminPassword": "[parameters('AdminPassword')]"
},
"storageProfile": {
"imageReference": {
"publisher": "MicrosoftWindowsServer",
"offer": "WindowsServer",
"sku": "[parameters('OSVersion')]",
"version": "latest"
},
"osDisk": {
"createOption": "FromImage",
"managedDisk": {
"storageAccountType": "Premium_LRS"
}
}
},
"networkProfile": {
"networkInterfaces": [
{
"id": "[resourceId('Microsoft.Network/networkInterfaces', concat(variables('networkInterfaceName'), copyindex(1)))]"
}
]
}
},
"copy": {
"name": "virtualMachineLoop",
"count": "[parameters('numberOfInstances')]"
}
},
{
"apiVersion": "2017-05-10",
"name": "[concat(parameters('VMNames')[copyIndex()], '-' , 'BackupIntent')]",
"type": "Microsoft.Resources/deployments",
"resourceGroup": "[parameters('RSVResourceGroup')]",
"copy": {
"name": "AzureBackupLoop",
"count": "[length(parameters('VMNames'))]"
},
"dependsOn": [
"virtualMachineLoop"
],
"properties": {
"mode": "Incremental",
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"resources": [
{
"name": "[concat(parameters('backupVaultName'), '/', 'Azure', '/', variables('v2Vm'), resourceGroup().name, ';', parameters('VMNames')[copyIndex()])]",
"apiVersion": "2017-07-01",
"type": "Microsoft.RecoveryServices/vaults/backupFabrics/backupProtectionIntent",
"properties": {
"friendlyName": "[concat(parameters('VMNames')[copyIndex()], 'BackupIntent')]",
"protectionIntentItemType": "AzureResourceItem",
"policyId": "[resourceId(parameters('RSVResourceGroup'), 'Microsoft.RecoveryServices/vaults/backupPolicies', parameters('backupVaultName'), parameters('BackupPolicy'))]",
"sourceResourceId": "[resourceId(resourceGroup().name, 'Microsoft.Compute/virtualMachines', parameters('VMNames')[copyIndex()])]"
}
}
]
}
}
}
]
}

Answer 1

Tested in my environment was getting same error as you are getting.
Solution
please remove sqaure bracket from [copyIndex()] and seprate with , for wherever you are using like below.
"name": "[concat(parameters('VMNames'),copyIndex(1),'_','BackupIntent')]",
instead of
"name": "[concat(parameters('VMNames')[copyIndex()], '-' , 'BackupIntent')]"