Session Preview - Authorization failed

Question

I am configuring UI 2012 on Tridion 2011 SP1 HR2

I am currently bamboozled by an error I get when clicking "Update Preview"

It makes a call to

/WebUI/Models/SiteEdit/Services/Services.svc/GetPreviewToken

and returns

{"ExceptionDetail":null,"ExceptionType":null,"Message":"Authorization failed. Please make sure the proper username and password have been configured in the Publication Target.","StackTrace":null}

I have commented out all security sections in cd_ambient_conf files

Answer 1

On the publication target properties in the CMS you most likely need to specify the authorization credentials. See screenshot.