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This query lists external Microsoft Teams senders by the date they were first seen, surfacing recent first-contact senders.
| Attribute | Value |
|---|---|
| Type | Hunting Query |
| Solution | GitHub Only |
| ID | 667772be-deff-4c7e-9da6-ada1780cc45c |
| Tactics | InitialAccess |
| Techniques | T1566 |
| Required Connectors | MicrosoftThreatProtection |
| Source | [View on GitHub](https://github.com/Azure/Azure-Sentinel/blob/master/Hunting Queries/Microsoft%20365%20Defender/Email%20and%20Collaboration%20Queries/Microsoft%20Teams%20protection/First-Contact%20External%20Teams%20Senders.yaml) |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
MessageEvents |
IsExternalThread == "1"IsOwnedThread == "0" |
✓ | ✗ | ✓ |
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