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Data source error: We're sorry, an error occurred during evaluation.
Greetings, Starting from 2PM Pacific Time on June 21st, a scheduled dataset refresh in the Power BI Service began to fail at every refresh with an "Error occurred during evaluation" message. A ...
Same with me, also retrieving data from Dynamics 365 for Sales. Found this post at https://powerbi.microsoft.com/en-us/documentation/powerbi-refresh-troubleshooting-refresh-scenarios/