Fixing “The background refresh of ‘Query’ failed.”

This error occurs when an Excel Power Query or legacy data connection encounters a critical failure, such as a broken file path, an authentication rejection, a schema mismatch, or an expired query timeout, while running on an asynchronous background calculation thread.

Quick Answer

Disable background refresh in the query’s properties window. Doing so forces the query to execute in the foreground, turning this generic notification into an actionable, specific error code (such as a 404 URL break, a DataFormat error, or an access denied message) that points directly to the underlying cause.

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Why Background Refresh Hides the Root Cause

By default, Excel configures data connections to refresh in the background. This keeps the grid responsive so users can continue editing formulas while data downloads.

However, when an asynchronous query fails, Excel cannot display modal error diagnostics on the background thread. Instead, it catches the exception and drops a non-specific warning in the status bar: “The background refresh of ‘Query’ failed.” To fix the issue, you must surface the true diagnostic message.

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The Diagnostic Procedure

                     ["Background refresh failed" Alert]
                                      │
                                      ▼
                        [Disable Background Refresh]
                                      │
                                      ▼
                          [Run Refresh in Foreground]
                                      │
         ┌────────────────────────────┼────────────────────────────┐
         ▼                            ▼                            ▼
  [Path / File Error]         [Credential Failure]         [Timeout / Hang]
         │                            │                            │
         ▼                            ▼                            ▼
Verify source path,           Clear & reset Data           Extend CommandTimeout
check relative links          Source Permissions           in M-code / SQL step

Step 1: Force Foreground Execution

Disabling background refresh removes the layer masking the error:

1. Navigate to the Data tab and click Queries & Connections to open the side pane.
2. Locate the query listed in the error alert.
3. Right-click the query and select Properties.
4. In the External Data Range Properties (or Query Properties) dialog, switch to the Usage tab.
5. Uncheck the option “Enable background refresh”.
6. Click OK, then click Refresh on the Data tab.

Instead of the generic alert, Excel will display a detailed diagnostic message.

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Resolving the Unmasked Root Causes

Once the foreground refresh runs, address the specific underlying error:

Scenario A: “Data Source Not Found” or Path Break

The most common error exposed is an invalid path caused by moved directories, altered drive letters, or broken SharePoint links.

• If a mapped network drive or cloud directory changed location, re-point the source step in the Advanced Editor.
• For best practices on avoiding breaks when files are moved or shared, see “Data Source Not Found”: Fixing broken paths after moving a folder and Using Relative Paths in Power Query to avoid “Hardcoded” path errors.

Scenario B: Expired Credentials or Authentication Drops

If the background query fails against a corporate SQL server, web API, or SharePoint list, the local credential cache may be out of date.

1. In Excel, go to Data > Get Data > Data Source Settings.
2. Select Global permissions.
3. Highlight the target data source and click Clear Permissions.
4. Re-run the refresh. When prompted, re-enter your credentials using the appropriate authentication method (Windows, Organizational Account, or Database).

Scenario C: Query Execution Timeouts

If the query pulls large datasets or calls complex remote views, the database driver may drop the connection before the query finishes building.

• Add an explicit timeout override to your connection string in the Power Query M-code.
• To configure custom query limits, see Handling Refresh Timeouts: Setting the CommandTimeout parameter.

Scenario D: PivotTable Structural Overlaps

If your query loads its output directly into a worksheet adjacent to a PivotTable, expanding row volumes may try to overwrite existing PivotTable ranges, triggering a background load drop. For complete steps to resolve grid collisions, consult Troubleshooting “PivotTable report cannot overlap another” during PQ refresh.

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Before You Finish: Restoring Refresh Modes

Once the underlying data connection or schema mismatch is resolved:

• If your model requires unattended user interaction, you can safely re-enable “Enable background refresh” in the Query Properties dialog.
• If multiple interconnected queries rely on the output of this table, leave background refresh disabled to ensure downstream formulas and dependent tables do not run out of sequence. For resolving query dependency ordering issues, see “This query contains a reference to another query”: Handling dependency breaks.