Dear Jude,

The message occurs when you include ApplicationIntent=ReadOnly (AlwaysOn Availability Groups properties) in your connection string. And the server does not recognize the property.

To resolve this issue you will have to install the hotfix/update that introduce support for AlwaysOn feature from SQL Server 2012.

You can download the update from here.

# http://support.microsoft.com/kb/2654347

Hope it helps...!!!

Regards

Shafat Husain