我想体验驻地化Lync和Lync online通信的效果，我本地搭建了一个驻地化Lync，部署了edge服务器，本来一切都是通的，有一天我将edge对应公网的证书导出，换到exchange中的时候，不小心删除了本地公网证书的私钥，因为有私钥有备份，双击私钥后，也导入成功，现在出现我的edge服务已经开启不来，提示5个错误，到网上也找不到出路，只能发帖求助了，分别是：
1)LS Audio/Video Authentication service could not be started.
Exception: Microsoft.Rtc.MRAS.MRASException: PrivateKey not accessible
2)Private key for server certificate not found by the LS Audio/Video Authentication service or the service does not have sufficient permissions to access the certificate.
3)The service failed to start.
Error Code: 80004005!_HRX!
4)The protocol stack reported a critical error: code 80090016 (Configuration failure prevented the server from starting up). The service has to stop.
5)The protocol stack reported a critical error: code 80090016 (Configuration failure prevented the server from starting up). The service has to stop.
