How to fix 400 Error table' operator: Failed to resolve table expression named 'DeviceNetworkEvents'

Question

Whilst using both a Python script and the Advanced Hunting UI, https://security.microsoft.com/v2/advanced-hunting? the response was 400 error stating the table DeviceEvents, does not exist.

The following permissions have been set for the credentials.

• ThreatHunting.Read.All 
• SecurityAlert.Read.All  
• SecurityIncident.Read.All 
• SecurityEvents.Read.All 
• AdvancedQuery.Read.All

However, of the 59 available tables, referenced in the MDE documentation, only 22 successfully ran and the others returned a 400 error stating the table does not exist.

Answer 1

The error indicates that the table DeviceNetworkEvents does not exist or is not accessible with your current permissions. Here are a few steps to troubleshoot:

1. Verify Table Availability: Ensure that DeviceNetworkEvents is a valid table in your environment. The availability of tables can vary based on your Microsoft 365 Defender subscription and configuration.
2. Check Permissions: Confirm that your account has the necessary permissions to access the DeviceNetworkEvents table. The permissions you listed seem appropriate, but double-check if any additional permissions are required.
3. Table Name Accuracy: Double-check the spelling and case sensitivity of the table name in your query.
4. Subscription and Data Plan: Ensure that your subscription level includes access to the DeviceNetworkEvents table. Some tables might be available only in higher-tier plans.

If the issue persists, you may need to contact Microsoft support for further assistance.