Exchange sever出现问题.帮忙?

苏州小白

在事件查看器中的应用程序发现个这样的情况,到底是什么问题,希望有高手帮我解决??是不是有以用户数量限制啊?<br>
The product Microsoft Exchange Server 5.5 is out of licenses. Use License Manager from the Administrative Tools folder for more information on which users are out of compliance and how many licenses should be purchased.

苏州小白

谢谢哦