Authentication, windows or custom

I have read most of the threads regarding form authentication as well as the suggested articles. Unfortunately I am not clear if I need to do custom security or stay with windows authentication

I would like to access a specific report using a URL so that all the features and funcionalty of the report is available to the user. There are to many users and reports to assign and maintain individual users and/or groups to a specific report.

Our users would access the report from either a windows or web application having already passed security. They would have a button to press to obtain the report. We would prefer to pass a specific userid to report services at this point that is authorized to view the report.

Can this be done without switching to custom security? To use form authentication must you switch to custom security? Would impersonation work?Hi,

If you go with Windows Authentication, then you can retrieve the Windows UserId from the Thread class - Thread.CurrentPrincipal.Identity.Name

Regards,
Vikram