In Excel Report Builder for Dynamics GP V10, we get to see this message when a User other than “sa” tries to publish the Report.
"Excel Report Builder: You do not have security privileges to publish this report."
This happens despite the necessary permissions are assigned to the respective user to do the same. The answer is that the current functionality limits the publishing reports in Excel Report Builder to sa user only and no other user can actually publish the same. So, Anyone trying their hard luck to get this done through a User other than sa, do not waste your time on setting this up and instead use the sa user for this function.