Using expression in Azure key vault task?

[tanulbhasin]

Hello,

This is giving invalid key vault name. Does Azure key vault task accepts expression. If not then how to pass the value to azure key vault in such scenario

variables:
- group: env_map
- name: qaNamespace
  value: $[coalesce(variables[variables['Build.SourceBranch']], '')]
 


- task: AzureKeyVault@2
displayName: Download Secrets from Key Vault
inputs:
azureSubscription: ${{parameters.azureSubscription}}
KeyVaultName: replace(replace(replace(variables['qaNamespace'], 'a', 'vault1'), 'b', 'vault2'), 'c', 'vault3')
SecretsFilter: 'PASSWORD,UserID'
RunAsPreJob: false