<iisnode node_env="xx" /> doesn't update the process.env.NODE_ENV

[BigZolo]

it used to work but now I cannot change the NODE_ENV thru web.config, it always gets the value of the %node_env% environment variable.

[rosman21]

I had the same issues, I made it lower case and it worked for me try that... <iisnode node_env="Prod"