title: Azure data factory promotion from test to dev, authentication method is Managed identity for Azuressql,using azure devops CI/CD
body: <p>I am using ADF and authentication method is Managedidentity -- then code is pushed to adf_publish 
      branch in Git hub and from there we are building the CI/CD in azure devops.</p>
  
  <p>Problem - I used Managed identity for all the resources used in ADF like (keyvault,storage,azuresql) 
  for Keyvault I am geeting this http url (<a href="https://BDAdhfsKV01.vault.azure.net/" rel="nofollow noreferrer">https://BDAdhfsKV01.vault.azure.net/</a>) this url we are 
  paramterised in Azure devops release pipline (https://"$(vaultname)".vault.azure.net/) like this, 
  but for Azure sql while using Managed identity I am getting blank in connection string after 
  publishing to adf_publish branch to Git. How can be prameterised or promote to dev. </p>
  
  <p>Just for refrence attaching the devops screen shot how I have paramterisded the keyvault URL at CD.
  Same case blank connection string using Managed identity is with Azure synapse as well , Is there any 
  help on this or any issue with Managed identity.</p>
  
  <p><img src="https://i.stack.imgur.com/EpfUA.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/FnWZL.png" alt="enter image description here"></p>