When you try to edit Customer Portal for Dynamics CRM 2011 – you may get this error message: An error has occurred while saving your content. Your changes have not been saved. This is caused by some modifications that are installed during upgrade to Windows Server 2008 SP1. Here is link for update to ASP.net 4.0: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=41bdce1f-3cb3-44bb-9b33-23a1b8c99ac3&displaylang=en Thanks Shan McArthur from AdxStudio to point out on his blog.