I'm using code in a report to show/hide a column based on the current user. It's using the following line of code to check role membership:
System.Threading.Thread.CurrentPrincipal.IsInRole("DOMAIN NAME\AD Group Name").
This works great when I deploy to our native mode SSRS server. When I deploy to out SharePoint integrated mode server, however, it fails. I think it's due to the way that SharePoint manages roles. I've enabled the roleManager in web.config for SharePoint as I found a few related blogs that suggested I do that.
This may be more appropriate for a SharePoint forum, but I thought I would start here in case anyone has come across this before.
-Henry