Can these issues be sorted out or any feedback comments welcome.
If you want to upload large amounts of files to Azure blob and it will spend lots of time, I suggest you use Azure AD Authentication. It may be a better way. And, Azcopy supports multiple Azure AD Authentication ways, such as managed identity, User, Service principal. But, please note that no matter which method you use, you need to assign Storage Blob Data Contributor
for them. For more details, please refer to the document
For example, I use a service principal
az login
az account set --subscription "<your subscription id>"
# it will assign Storage Blob Data Contributor to the sp at subscription level
az ad sp create-for-rbac -n "mysample" --role Storage Blob Data Contributor
$env:AZCOPY_SPA_CLIENT_SECRET="$(Read-Host -prompt "Enter key")"
azcopy login --service-principal --application-id <application-id> --tenant-id=<tenant-id>