@Shweetaleena Sahoo AZTS not a Microsoft product, this is more of an Internal tool which is created by CSEO division within Microsoft for obtaining visibility to cloud subscriptions and resource configuration across multiple subscriptions in an enterprise environment.
You can reference this github article which describes about externally scanned controls in AZTS :
https://github.com/azsk/AzTS-docs/tree/main/Control%20coverage#externally-scanned-controls-in-azure-tenant-security-azts
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