Hi,
这个session是指用户登录到outlook服务器时，分配给用户的唯一标识。
您在获取联系人的时候需要先登入outlook服务器，请您首先看以下这个链接：
http://msdn.microsoft.com/en-us/library/live/hh243641.aspx
关于获取有效联系人ID您可以参考以下链接下的Specifying
a contact
ID：
http://msdn.microsoft.com/en-us/library/live/hh826527.aspx#top
更多关于Live Connect develop
的问题您可以在以下论坛提交：
http://social.msdn.microsoft.com/Forums/live/en-US/home?forum=messengerconnect
在这里您会得到更加专业的帮助！
祝您好运！
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windows8 api 编程方式访问 联系人和日历
