Hello, I have a situation I need to address per our customer request and can't find a solution.

I have Silverlight Web Part for Sharepoint 2010 using the Custom Contact List Silverlight Lync Control.

The control requires the website hosting the application to be in the "Trusted Sites" Zone, but I can't have it in both "Trusted Sites" and "Intranet Zone". If it's in "Intranet Zone" the Web Part won't work but if it's "Trusted Sites" the Web Part will work but it will always require the users to enter their credentials, our customer doesn't want to be entering their credentials on their intranet all the time, is there a workaround of some kind for this scenario?

I really appreciate your help,

Thank you very much,

Kevin.