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Antimalware Engine 1.1.11701.0 was released to customers on 18 May 2015

Antimalware Engine 1.1.11701.0 was released to all Windows Defender, Microsoft Security Essentials, Forefront Client Security, Forefront Endpoint Protection, Windows Intune Endpoint Protection, and System Center Endpoint Protection customers on 18 May 2015. Signature package 1.199.0.0 is the first that contains this engine.