There are 2 IIS servers in my internal network. I created a virtual directory among them. 2 of my servers are connected to active directory. I granted the necessary permissions and gave full permission to read, write and modify the virtual directory.
I can view files on IIS server A with a virtual directory on server B. But I need to save files from server B to server A directory. I cannot add it because IIS_IUSRS does not have permission in the virtual directory on server B. How can I configure this authorization? Or do I need to give another authorization from active directory?

I would be happy if you help. Sorry my bad english.

I made authorizations between 2 servers. Files can be viewed on sites, but when I upload files from site B, it is not registered in site A directory.