Hi Jorgen,
You did the right thing by skipping the report server URL. Keep in mind that the SQL Report Builder (or even Visual Studio) does not interact with NAV the same way that a SSRS report does.
The big difference with NAV is that when you wish to design or change a report's layout, you must first start from NAV.
- If you are a developer, then you will launch the NAV Development Environment, Design the report in question from the Object Designer, and then go to the menus to select View > Layout. The default tool for designing reports (SQL Report Builder or Visual Studio) will launch, and you will be able to work with the RDL file. Once in this tool, you can only work with datasets/expressions that have been declared in the NAV Report object. If you need to add more, you have to go NAV (with the Report Object in Design Mode) and here you can do that. The SQL Report Builder and/or Visual Studio are only for the purpose of working with the report layout, toggling visibility and some basic calculations using expressions. When done, you save, close the SQL Report Builder tool, and you are returned to NAV. You save that Report object and compile / close it, and you're done.
- If you are not a developer, just a NAV user interested in making some modifications to the layout, you can either use Microsoft Word (simpler tool, but also has lesser capabilities), or SQL Report Builder (or Visual Studio) for RDLC. In this case, you first go to Report Layout Selection to determine which report you want to create a custom layout for. Select it, click Custom Layouts, create a New Custom Layout (or select the one you wish to modify; I recommend making backups so you don't mess up the pre-built layouts), and then click the Export button in the ribbon to get the .rdl file. You open this file in SQL Report Builder or Visual Studio, and make the desired changes to your layout. When done, save and close the file. In NAV, click Import and select the updated file to get it into NAV. Back on the Report Layout Selection page, be sure to select the Custom Layout you've created as the Custom layout to run. Sometimes, NAV may have more than version of a certain report (for different localizations, or one detailed and one summarized). You can determine which Report is printed, by going to the Report Selections Sales, Report Selection Purchase or another similar Report Selections page to define which Report ID will be run when you tell the system to print a report.
I hope this helps. If my response has answered your question, please verify by clicking Yes next to "Did this answer your question?"