Thank you for your response Noah.
Yes, I am still getting the same error even though I have implemented the proxy page. When I am doing is:
1. Creating a new feature layer (myFeatureLayer) with a URL to a Feature Service
2. Creating a new graphic (myNewGraphic) with some attributes
3. Calling myFeatureLayer.applyEdits([myNewGraphic], null, null, function(adds,edits,deletes){...});
When running on our dev site, step 3, in all browsers EXCEPT IE 9 work and I am able to add the graphic. However IE 9, it says "Error: Access is Denied."
On localhost in IE 9 however, it prompts me with the "This page is accessing information that is not under its control This poses a security rist. Do you want to continue?"
Do I need to add the secured resources using http or https?
Thank you,
Alex