亲测网上所谓的单端口多证书https不可行，iis7仅支持单端口单证书

第一步：修改配置文件。

打开：C:/Windows/system32/inetsrv/config/applicationHost.config

搜索你的站点名称找到类似下面的配置项，做相应修改：

<site name="exlb" id="10066" serverAutoStart="true">                 <application path="/" applicationPool="exlb">                     <virtualDirectory path="/" physicalPath="d:\wwwroot\exlb\wwwroot"/>                 </application>                 <bindings>                     <clear />                     <binding protocol="http" bindingInformation="*:80:www.exlb.pw" />                     <binding protocol="http" bindingInformation="*:80:www.exlb.org" />                     <binding protocol="http" bindingInformation="*:80:exlb.org" />                     <binding protocol="http" bindingInformation="*:80:exlb.pw" />                     <binding protocol="https" bindingInformation="*:443:" />
</bindings>
<limits maxBandwidth="4294967295" maxConnections="4294967295" />                 <logFile enabled="false" />
</site>

找到https的配置项目，修改为：

<binding protocol="https" bindingInformation="*:443:www.exlb.org" /> 

在443后面增加你的域名，保存
最后重新启动IIS服务 即可