Hello everybody,
I am trying to configure and use arcpy on IIS. I can run basic Python code but I cannot import arcpy. The error message is "Not signed into Portal".
Actually I have signed in on ArcGIS application..

I installed ArcGIS at location:
C:/Program Files/ArcGIS/Pro/bin/Python/envs/arcgispro-py3/python.exe
My IIS is

My CGI configuration is 
I write basically Python script

When I try to run my script on Windows Command Prompt without IIS environment. It works well.

When I try to run my script on browser of IIS (for example Chrome). It doesn't work
But if I remove "import arcpy" outside my python script, and try again. It works

I don't know why. I have searched to find the solution but I cannot fix it.
I really need to resolve it soon because School deadline is short. If someone know how to fix please help me
Thank a lot.
p/s: I am sorry about my English.