Merge pull request #10334 from ryanberg-aquent/CI-8544

AB#8544: Troubleshoot log file configuration issues with custom tables in Azure Log Analytics

Author: ryanberg-aquent

support/azure/azure-monitor/log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-custom-table-log-file-configuration-issues.md

@@ -0,0 +1,49 @@
+---
+title: Troubleshoot Log File Configuration Issues when Managing Custom Tables in Azure
+description: Troubleshooting guide for log file configuration issues when managing custom tables in Azure.
+ms.date: 12/08/2025
+author: JarrettRenshaw
+ms.author: jarrettr
+ms.reviewer: v-ryanberg, neghuman
+ms.service: azure-monitor
+ms.custom: Configure and Manage Log analytics tables
+---
+
+# Troubleshoot log file configuration issues when managing custom tables in Azure
+
+## Symptoms
+
+When managing custom tables in Azure Log Analytics, users are unable to query logs due to a problem with the log file configuration.
+
+## Cause
+
+This issue isn't related to configuration settings. It's due to problems with the log file itself.
+
+## Resolution
+
+Follow these steps to resolve this issue.
+
+1. **Verify log file integrity**
+
+    1. Navigate to the [Azure portal](https://portal.azure.com) and access your Log Analytics workspace.
+    1. Check the integrity of the log files by reviewing the Log Management section.
+
+2. **Check application team fixes**
+
+    1. Ensure that the application team has addressed any log file issues.
+    1. Confirm that the logs are now accessible and can be queried without errors.
+
+3. **Test log queries**
+
+    1. Use the Log Analytics query editor to run test queries.
+    1. Confirm that the queries return expected results and that there are no errors.
+
+4. **Monitor log performance**
+
+    1. Use Azure Monitor charts to track log performance and identify any anomalies.
+    1. Set up alerts for any unusual activity or errors in log queries.
+
+## References
+
+- [Azure Monitor overview](/azure/azure-monitor/fundamentals/overview)
+- [Azure Monitor documentation](/azure/azure-monitor/)

support/azure/azure-monitor/toc.yml

@@ -121,6 +121,8 @@ items:
       href: log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-custom-table-file-upload-errors.md
     - name: Troubleshoot performance logs not populating in Azure Government
       href: log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-performance-logs-not-populating.md
+    - name: Troubleshoot log file configuration issues when managing custom tables in Azure  
+      href: log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-custom-table-log-file-configuration-issues.md
     - name: Troubleshoot deleting migrated custom tables in Log Analytics
       href: log-analytics/configure-and-manage-log-analytics-tables/troubleshoot-deleting-migrated-custom-tables.md
   - name: Log Analytics workspaces