SSRS Question

This is an off product SQL connection question unrelated to HeidiSQL but I think it can be answered here because it deals with database connection issues.

I am doing some test driven development on my first SSRS report I am doing some work, then I test to see if it throws an error. The code works in Visual Studio when I preview it But it threw an error

Here is the error: Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.

The whole error is: An error occurred during client rendering. An error has occurred during report processing. Cannot create a connection to data source 'RulesDataSource'. Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'. Please advise.

That looks as if your connection component does not get the credential you have passed (did you even?)

Some permission issue in the server... Or, did you try this? https://stackoverflow.com/questions/10760162/login-failed-for-user-nt-authority-anonymous-logon