We have a configuration (all windows 2012 and IIS 8) with a cluster share setup and all sit econtent located in the share. Application pool idnetity is set to an AD user and pass-through auth is enabled along with the anonymous auth set as the app pool identity. We're using the fastcgi module and PHP was installed through WPI. We can create a php simple script to write a directory, but Wordpress is not able to. We also tried switching the auth to an administrator which we know has complete access and it didn't work.
Does anyone have any idea? Is there a WP bug where it cannot write to shares?