title: How to rename a blob file using powershell
body: <p>seemingly simple task. I just want to rename a blob file, I know I have to copy it to rename or something, then delete the original but this is proving tricky. I have created the storage context (New-AzureStorageContext), and got the blob (Get-AzureStorageBlob), and found Start-AzureStorageBlobCopy, but how to I actually rename it? </p>
  
  <p>I'd like to do this within the same container if possible as well. Ideally I'd run it in an Azure Runbook and call it using a webhook I Azure Data Factory v2. I did try to rename the file using 'Add Dynamic Content' in the copy job sink in DFv2, but I don't think you can. By the way, I just want to append the date to the existing file name. Thank you.</p>