现在情况是只有Admin能够读取忙/闲，其余帐号都不行，官方说明中有以下这段话：
In new profiles, the default protocol for free/busy is HTTPS. There might be a collision if Kerio Connect uses a self-signed certificate (set by default after installation). In such cases, an error is reported by a bubble message displayed in the system tray's notification area and the free/busy function will not work. To resuscitate the function, install this certificate on the client's list of trusted certificates.