SeenBy()

Applies to:

• Microsoft Defender XDR

The SeenBy() function is invoked to see a list of onboarded devices that have seen a certain device using the device discovery feature.

This function returns a table that has the following column:

Column	Data type	Description
DeviceId	string	Unique identifier for the device in the service

Syntax

invoke SeenBy(x)

• where x is the device ID of interest

Tip

Enrichment functions will show supplemental information only when they are available. Availability of information is varied and depends on a lot of factors. Make sure to consider this when using SeenBy() in your queries or in creating custom detections. For best results, we recommend using the SeenBy() function with the DeviceInfo table.

Example: Obtain list of onboarded devices that have seen a device

DeviceInfo 
| where OnboardingStatus <> "Onboarded" 
| limit 100 | invoke SeenBy()

Related topics

• Advanced hunting overview
• Learn the query language
• Understand the schema
• Get more query examples

Tip

Do you want to learn more? Engage with the Microsoft Security community in our Tech Community: Microsoft Defender XDR Tech Community.