How to define multiple data sources for a single dataset in power BI report.

I think that Parameters were introduced for this kind of scenario (among others). However, there was a post earlier where parameters were causing issues with enterprise gateway.

You can have multiple Sources in a query. My blog article here touches on this. What I am wondering is if you could create an if then else statement in M and select between a data source based upon a parameter versus parameterizing the server name. Going to give that a try.