IPhone4与Exchange 2010同步失败

今天拿到IPhone4，设置与Exchange 2010同步，帐号建立成功，同步时出错：“cannot get mail the connection to the server failed”。別的同事的帐号都没问题。google之，原来是因为我的帐号是管理员。解决办法是在帐号的属性->Security->Advanced中选中"Include inheritable permissions from this object's parent"，然后马上同步Exchange。一小时内这个选项会被自动还原。具体原因参照：

http://retrohack.com/enable-activesync-outlook-anywhere-exchange-2010/

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2861-Activesync-Working-But-Only-For-Some-Users-On-Exchange-2007-2010.html