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Fix Power BI Snowflake Connection URL with Underscore

Maira MehtabMaira Mehtab Sep 20, 2026 868 views

Question details

The user is unable to establish a connection between Power BI and a Snowflake database because the custom connection URL contains an underscore character.

Product
Power BI, Snowflake
Device & OS
not provided
Scenario
Setting up a new database connection from Power BI to Snowflake using a specific URL.
Observed behavior
The connection attempt fails or throws a formatting error when the Snowflake URL includes an underscore.
Before you start

Verify your Snowflake account URL structure and ensure you have the latest version of Power BI Desktop installed, as Microsoft frequently updates connectors to resolve URL parsing bugs.

Solution 1Recommended

Consult Microsoft Fabric and Power BI Forums

Since this is a specific URL parsing issue within the native connector, reaching out to specialized Microsoft forums is the most effective way to resolve or report the formatting constraints.

Underscores in URLs can sometimes conflict with standard URL parsing rules (RFC standards) utilized by Power BI's Snowflake connector. Specialists in the official Microsoft forums have direct access to bug trackers and connector behavior documentation.

1
Visit the Community

Navigate to the official Microsoft Fabric or Power BI Community forums in your web browser.

2
Search for Known Issues

Search the forum for existing threads using keywords like 'Snowflake connector underscore URL' to see if a patch or workaround has already been posted.

3
Create a New Topic

If no solution exists, create a new support topic detailing your exact Power BI version and the sanitized Snowflake URL format (masking any sensitive account names).

4
Follow Expert Guidance

Work with Microsoft support engineers or community specialists to investigate the specific connector behavior and URL requirements.

Protect Sensitive Information: When posting in public forums, never share your actual database credentials or sensitive URL parameters. Mask those parts while retaining the underscore structure.
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Frequently Asked Questions

Why does an underscore in a URL cause connection issues in Power BI?

In standard networking protocols and hostname specifications (RFC guidelines), underscores are not strictly recognized as valid characters. This can cause strict URL parsers in tools like Power BI to reject or misinterpret the server address.

Can I connect WPS Spreadsheets directly to Snowflake?

WPS Spreadsheets excels at processing data exported from Snowflake (such as CSV or Excel files). For direct database connections, ODBC drivers can be configured depending on your operating system setup.

Where can I find my exact Power BI Desktop version?

Open Power BI Desktop, navigate to the 'Help' tab in the top ribbon menu, and select 'About'. A dialog box will display your current version and build number, which is useful when requesting support.

Are hyphens allowed in Snowflake connection URLs?

Yes, hyphens are considered standard alphanumeric characters for hostnames and are fully supported by both Snowflake and the Power BI connector.