I followed all the following MVC/EF tutorials:

https://www.asp.net/mvc/overview/getting-started/introduction/getting-started

Getting Started with Entity Framework 6 Code First using MVC 5

Getting Started with Entity Framework 6 Database First using MVC 5

Using Windows Authentication.

I applied to some to a few tables in a SQL Server (2008R2) database.  This is on a separate server from workstations and IIS server.

Everything works perfect with the studio debugging browser.

• Pages render beautifully
• Windows credentials are displayed
• SQL data is access and passed to the views perfectly

When ran from IIS (7.5 on server 2008 R2):

• Pages render beautifully
• windows credentials are displayed
• SQL data isn't accessable

• Error.

  An error occurred while processing your request

Please help. We are not using Azure AD yet. We need to use AD for our intranet site authentication.