I am on a virtual ColdFusion 10 Developer computer running Windows 2008 R2 Datacenter and am trying to setup a datasource to connect to our SQL 2008 server which is running on Windows Server 2008 Standard.

I can successfully connect using ANY SQL Login that I create, however I cannot authenticate when using Windows Authentication. Both servers belong to the same domain, and the SQL Server is setup for Mixed Mode.

On the SQL Server I created a new User called: DOMAINNAME\Username. He is public and was mapped to a database as user DOMAINNAME\Username with a default schema of DOMAINNAME\Username.

When attempting the authentication, CF returns this error:

Connection verification failed for datasource: test
java.sql.SQLInvalidAuthorizationSpecException: [Macromedia][SQLServer JDBC Drive][SQLServer]Login failed for user 'DOMAINNAME\Username'.
The root cause was that: java.sql.SQLInvalidAuthorizationSpecException: [Macromedia][SQLServer JDBC Driver][SQLServer]Login failed for user 'DOMAINNAME\Username'.

I have spent 3x 10-hour days, doing countless searches on Google and all things have appeared fruitless, so I'm asking for whatever help anyone can give. Previous solutions hinted at active directory delegation being enabled for both servers, but after performing those steps, I was at the same end result.