We have a new KB article that describes a problem where the Endpoint Protection view v_GS_AntimalwareHealthStatus reports an incorrect Endpoint Definition status based on the AntivirusSignatureUpdateDateTime value in versions of Microsoft Configuration Manager that are older than version 1511. This problem prevents some of the information typically found in state messages for Endpoint Protection from being displayed in this view.
This is a known problem that's fixed in ConfigMgr 1511 and all later versions. For complete details please see the following:
J.C. Hornbeck, Solution Asset PM
Microsoft Enterprise Cloud Group