Does EMM support Windows Phone 8.1?
Are there EMM agent, Secure Container and AntiVirus like on android devices?
I'm about to upgrade from EMM 11 to 12 & only saw WP 7 & 8 mentioned in the install guide:
McAfee KnowledgeBase - Supported Platforms, Environments, and Operating Systems for Enterprise Mobil...
Did you try with WP 8.1?