Power BI Service vs Server

My current company were in a similar position when I joined recently. I quickly pulled them off PBI Service (it simply costs too much to get everyone access) I sometimes get a message from PBIX files that were created in the PBI desktop app used for service, when opening them in the PBI RS version of the desktop app.

The message mistakenly says it "cannot open file" but if you click OK, it opens anyway and you can do your changes and upload. I've not experienced any problems when pushing these files onto our PBI RS but your milage might vary depending on the features you've used.

At the time of writing this, I think we are expecting a new release of PBI RS during this month (2 weeks left) which should (for a short while) bring it pretty much up to date with the current Service version.