Oracle ORA-12154 error on local IIS, but not with Visual Studio Development Server

Question

I\'ve got an ASP.NET application that can connect to Oracle when it\'s started by Visual Studio Development Server, but when I deploy it to my local IIS, it does not connect

Answer 1

If you are using ApplicationPoolIdentity, Make sure ApplicationPoolIdentity has access to your TNS directories.

See here how to authorize: IIS7 Permissions Overview - ApplicationPoolIdentity