I got the last bit of my issue solved. I thought for a start it would be easier to provide the AZURE_STORAGE_ACCOUNT and AZURE_STORAGE_KEY in my 'example.env' in plain text and not access my environment variables because I was not sure about the syntax. Turns out the syntax is not AZURE_STORAGE_KEY="mystoragekey123" but AZURE_STORAGE_KEY=mystoragekey123 . Same for AZURE_STORAGE_ACCOUNT . Also the syntax for accessing my environment variables is just the same as in the clearml.conf, so I now use AZURE_STORAGE_KEY=${AZURE_STORAGE_KEY} and it works just fine.
So I guess there is no need for a github issue?