Error when trying to use DirecQuery - Alternate credentials are not supported

[ybog]

I have a big problem when i want to use DirectQuery. I have a DomainController with installed SQL Server. I have installed Data Gateway and must modify the Service Account to Local System to be able to finish setup. i have setup the Data Gateway successfully in Enterprise Mode. In PowerBi.com everything looks fine and can see the Gateway and no errors.

When i now create a new File with a SQL connection and Mode "Import" and publish it to PowerBi.com, then it works fine and when i schedule a refresh, this works fine, too.

But i want to use DirectQuery on a Database table for example. For this scenario i have created a new Power BI File and selected the same database which i already created as DataSet in PowerBI.com under my Gateway. Then i load the data in the file and while trying to load it i am always receiving the following error message:

Create Connections

Alternate credentials for Windows authentication is not supported in DirectQuery mode. Use your current windows credentials, supply a database credential or switch to import mode.

In PowerBI.com under Gateways and Data source i have used Windows Authentication and used the Administrator account which has also permission on the Database. 

I dont know what this message means and i should change. Can someone help me? 

[v-qiuyu-msft]

Hi @ybog,

As the error message stated, DirectQuery doesn't support Alternate credentials for Windows authentication. You can go to Data source Settings, find that data source, click Edit Permission, check "Use my current credentials" or specify credential for Database authentication. 

Best Regards,
Qiuyun Yu