你好 Henry,
由于Internet Explorer Maintenance (IEM) 从Internet Explorer 10以后就已取消, IEM的设置迁移到“Preferences -> Windows Settings -> Registry” 或 “Preferences -> Control Panel Settings -> Internet Settings”中。
下面这个文档提供了详细的在windows server 2012 上设置IE proxy 的具体步骤:
http://www.cnblogs.com/developersupport/p/4127782.html
希望对你有帮助。
Best Regards,
Elaine
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