I manually configured Lync 2010, but every time I sign in, it tells me that it can not verify Hotmail.com id for security, to try again later, I am getting very frustrated, please help me before I destroy this machine!!!

You can't use a personal email account (Hotmail/Gmail/etc..) to sign into the Lync client. You can purchase an account from Lync Online: http://office.microsoft.com/en-us/lync/lync-online-overview-and-features-online-meetings-and-instant-messaging-FX103789571.aspx 

If you want to use the Lync client you have to by a Office 365 License, like Michael mentioned, or you have to install a Lync Server on premise.

Hi,

Agree with Michael and Holger,

Microsoft Lync Server is an enterprise real-time communications server. The Lync client is used to connect Lync Server. You cannot sign in Lync using Hotmail account.

The Lync client is only meant to be used with a Lync Server (hosted in a corporate environment) or an account hosted on Office 365 with Lync functionality enabled. After you doing that you can create a user on Lync Server and login to Lync Server with Lync client.

Best Regards,

Eason Huang