The URL Could Not Be Accessed Because of Internet Explorer Security Settings

I just ran into this when trying to validate a SharePoint (2010) site from within CRM2011. Here’ what I did to solve it:

  • Add the site you’re trying to validate against (https://sp.contoso.com) to your trusted sites in IE.
  • Drop the trusted sites level to Low
  • Click validate (which then the site should validate)
  • Make sure to set your trusted sites back up to Medium when done.

Hope this helps!