If you install a IMSDK without a registered license , it operates as a fully functional trial for up to 15 days. If you need more time to evaluate the product, contact the Sales Department at http://imsdk.com/support 

Trial Notification in Development Mode 

Trial notification does not occur during design-time. 

Trial Notification During Run-Time 

When your application which uses IMSDK component is executed then a dialog box appears to notify that this is trial version and will expire in remaining days. Please be aware that the component will cease to function after the trial period has expired.During the Trial Period the ServerURL Property Will be Set to http://imsdk.com/demo_imserver/imserver.aspx the property IMSDK.IMClient.ServerUrl will have no effect during trail you can only set this property to your own server once you have purchased the retail version