az CLI returns bad request when using bash variable

[DaliBTGHendaoui]

Describe the bug

I have this Az cli command that enables backup for a VM that I'd like to use with a script:

#Get required VM ID
getID=$(az vm show\
  --resource-group $resourceGroup \
  --name $vmName \
  --query id | tr -d '"')
  
# Enable backup for VM with the created policy
az backup protection enable-for-vm \
  --resource-group $resourceGroup \
  --vault-name $vaultName \
  --vm $getID \
  --policy-name $policyName

i get this error:

Operation returned an invalid status 'Bad Request'

this is the official Azure documentation i followed :

az backup protection enable-for-vm --resource-group myResourceGroup --vault-name myRecoveryServicesVault --vm $(az vm show -g VMResourceGroup -n MyVm --query id | tr -d '"') --policy-name DefaultPolicy
when I run the same command substituting the $getID with its value (echo $getID and then copy paste the value into the command) it works perfectly:

az backup protection enable-for-vm \                                                                                                                                                                    
  --resource-group $resourceGroup \
  --vault-name $vaultName \
  --vm /subscriptions/60793921-aaaaa-wwwww-ffff-xxxxxxxxxxxxxx/resourceGroups/rg_vm_backup/providers/Microsoft.Compute/virtualMachines/backup-vm \
  --policy-name $policyName

Related command

az backup protection enable-for-vm

Errors

Operation returned an invalid status 'Bad Request'

Issue script & Debug output

raceback (most recent call last):
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\knack/cli.py", line 233, in invoke
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 663, in execute
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 726, in _run_jobs_serially
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/core/commands/init.py", line 718, in _run_job
File "D:\a_work\1\s\build_scripts\windows\artifacts\cli\Lib\site-packages\azure/cli/command_modules/backup/_exception_handler.py", line 10, in backup_exception_handler
azure.core.exceptions.HttpResponseError: Operation returned an invalid status 'Bad Request'

cli.azure.cli.core.azclierror: Operation returned an invalid status 'Bad Request'
az_command_data_logger: Operation returned an invalid status 'Bad Request'
cli.knack.cli: Event: Cli.PostExecute [<function AzCliLogging.deinit_cmd_metadata_logging at 0x000002031E5E0700>]
az_command_data_logger: exit code: 1
cli.main: Command ran in 1.359 seconds (init: 0.561, invoke: 0.798)

Expected behavior

VM backup should be enabled for the VM

Environment Summary

azure-cli 2.53.0 *

core 2.53.0 *
telemetry 1.1.0

Dependencies:
msal 1.24.0b2
azure-mgmt-resource 23.1.0b2

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Extensions directory 'C:\Users\HENDAOUIMohamedAli.azure\cliextensions'

Python (Windows) 3.10.10 (tags/v3.10.10:aad5f6a, Feb 7 2023, 17:20:36) [MSC v.1929 64 bit (AMD64)]

Legal docs and information: aka.ms/AzureCliLegal

Additional context

No response

[azure-client-tools-bot-prd]

Hi @DaliBTGHendaoui,

2.53.0 is not the latest Azure CLI(2.56.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.