We are having issue with our customer satisfaction survey.  When user clicks on the Take Suvey link in the email received from ServiceDesk, they get the Invalid Directory error message and are unable to see the customer satisfaction form.  The full message is a below:

Problem: System.Web.Services.Protocols.Soap.SoapException:Invalid Active Directory Credentials at LogicBase.Ensemble.Userman.Userman.LoginUser(String email, Stringpassword, String instancename, Boolean insertLoginAudit) at LogicBase.Ensemble.Userman.Userman.LoginUser(String email, String password)

Has anyone come across this in your environment.  This only happens with the Take Survey link.  Users otherwise can log on to ServiceDesk.

Also, I am not clear on if users actually need to enter their credentials to access the Survey form or it is supposed to authenticate and open the form.

Any help would be appreciated.

Thanks