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To change a report data source from local files to PBI Service data or to change tenant where data is located can be done, but NOT with PBIT.
Instead build your report connected to local files, then delete all the data sources and save as PBIX. You can then connect that PBIX to any tenant that has the same data model in it.
Do not save as a template or you will lose your report after data is removed.
Hi @BenEaton,
If I understand you correctly, you want to built up your report on Power BI Desktop with your dummy model, then publish it to the service, and after that you need to change the data source of the report to the real model on the service, right?
If that is the case, I don't think it is possible to do it currently. Here is a similar idea shared on Power BI ideas. You can vote it up and add your comments there to make this feature coming sooner.![]()
Regards
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