Active Directory Attributes

Hello,

I would like to auto populate a few fields using AD attributes. After successfully logging in, I normally use something like this: XSession.Session["UserName"] or XSession.Session["UserID"]. The fields I'm looking to auto populate are 'Department' and 'Title.' I've tried substituting "UserName" with "department," "title," and "personalTitle" to no success.

Am I missing something? Do I have to create these variables before referencing them? If so, what's the correct way to do it?

Thank you.