I need to validate the connection to my data source, or change data source settings
In some cases, you might need to update your data source, or you got a connection error and need to check your settings. If so, take the following steps.
To validate your connection to the data source
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From the QuickSight home screen, choose Manage data.
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Choose New dataset.
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Scroll to FROM EXISTING DATA SOURCES.
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Choose the data source that you want to test or change.
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If the option is offered, choose Edit/Preview data.
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Choose Validate connection.
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Make any changes that you want to make, then choose Update data source.