I have an issue where a 3270 displayLU, assigned to a configured user, and "presented" to the users Reflection 10.0 client when configuring the session, won't connect. I get an Event ID: 731 "access denied" error logged in event viewer. It seems to only affect LU's that had some form of security or special access assigned to them on the Mainframe side. I can assign and connect with LU's from other HIS 2000/sp2 servers in the same subdomain. Just not the LU configured for this account on the mainframe. I can't find any info on EID 731 on MS site. Anyone have any info on this?