In SharePoint 2003 or 2007: If you've ever seen the "This page contains both secure and nonsecure items" error message, this post is for you. It pops up when you add an RSS reader web part to a page on a site that was in my Trusted Sites or Intranet Sites zone. This has annoyed me for a while, and after a little playing around in IE 7’s settings, I figured out how to get rid of it.
From IE 7 (pretty sure this is the same with IE 6) access the Tools menu, then Internet Options. Click on the Security tab, then select the zone your SharePoint site is in (for example the Internet Zone), the click the Custom Level button. Then scroll down to the Miscellaneous header and look for “Display mixed content” and set it to Enable. Click OK and exit IE, then open it up again and see if the message goes away. Verify the zone that IE has this site listed in by looking at the bottom toolbar of the IE window.
Colin Spence, MCP, MCTS Colin is a Partner at Convergent Computing, and performs in the roles of Senior Consultant, Software Architect and Practice Manager for the organization. He focuses on the design, implementation, and support of Microsoft based technology solutions, with a current focus on Microsoft SharePoint technologies. He has over 20 years experience providing a wide range of IT related services to a wide range of organizations.
He is a co-author of a number of SharePoint books including Microsoft SharePoint 2010 Unleashed and Microsoft SharePoint 2007 Unleashed, which have become a bestsellers on the subject, as well as Sams Teach Yourself Microsoft SharePoint 2003 in 10 Minutes. He has also contributed to numerous other Sams Publishing titles on Microsoft technologies and regularly presents on Microsoft Technologies.