Username on windows

Hi

we have an application deployed on Citrix. We didn't install the Citrix environment, but the problem is that now every session starts FileMaker with the username "Windows User". The problem is that this is not really practical

So we discovered that when we create a new Citrix User, FileMaker asks on first startup what Username he wants to use. So for new users we specify a different username, and apparently this username is stored somewhere in his Citrix environment.

So where is this "Username" actually stored? I found out that your favorite hosts/files are stored somewhere in the registry in your user settings on WIndows. Is this the same for the Username? If so, can someone point to the place where we can change this? So we can write a batch script that will change for all the Citrix users this value to their accountname, so they only have to type the password to access the FileMaker file (as the accountname is always automatically filled in with the username).

Just to be clear , I am talking about the value that you specify in Edit -> Preferences -> User name

Thanks!

Andries