Lakehouse SQL Analytics Endpoint no longer connecting

This kind of error usually points to a backend connectivity issue, especially when everything was working fine before and suddenly breaks without any config changes on your side.

A few things you might want to double-check before escalating:

• Try querying the SQL endpoint using ODBC or ADO.NET from a clean environment (like a VM or different network) to rule out local firewall or DNS issues.
• If you're using a custom DNS or proxy, make sure it's not caching an old endpoint address.
• Check if the SQL Analytics Endpoint URL resolves correctly via nslookup or ping (just to confirm DNS resolution).
• Also, try accessing the endpoint using Direct Lake mode in Power BI Desktop (if available) to see if the issue is specific to SQL connectivity.

That said, if you've already tried creating a new Lakehouse and the issue persists across tools, it's very likely a stale metadata or routing issue on the backend. In that case, yeah, best to raise a support ticket with Microsoft and include:

• Workspace name and ID
• Lakehouse name
• Timestamp of the failed attempts
• Full error message and stack trace (if available)

Hope this helps a bit while you wait for support to dig in.

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