Let me start by saying that I am not a server guy - I am a developer. But I develop and manage an ASP.NET application that uses Windows authentication. I've run into the problem I am about to describe before, and I would just like to understand how to remedy it since I am the one who always gets the original support request.

A user, let's call her JaneDoe, has just gotten married and her login has been changed to JaneJones. We have an application that uses Windows authentication to store the user's login name to a table and then redirects the user to another non-Windows authenticated site with a GUID which points to the table entry we just made. When the user reaches the second site, we read in the login name from the database using the GUID that was passed. Then, we look up the login name in another database where we track application permissions.

The problem is that the user is logging into her workstation as JaneJones, but the Windows authenticated site is still receiving a login name of JaneDoe. Is this a domain controller issue? Is it a workstation issue? What's the best way to resolve this?