Fix “login failed” error while editing Table Properties in SSAS Tabular via Visual Studio

Just a quick post regarding a strange problem I encountered while working on an SSAS Tabular model project.  Built on the same Vertipaq technology as Power Pivot, it’s very easy to get started and produce quick, efficient data models.  Unlike Power Pivot, which runs as an Excel add-in, SSAS Tabular models are developed in Visual Studio via the SQL Server Data Tools (SSDT) Business Intelligence add-on.  However, once you load up the development environment, it’s almost exactly the same, the only difference really being that when you build a tabular model in VS, it is developed against a temporary cube on a pre-installed SSAS Tabular instance.  Power Pivot just works entirely in memory, without requiring an SSAS instance.

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