RE: Announcement : Dell OpenManage Server Administrator – OMSA v 7.3 is available Now.
I looked into this further and it seems to be caused by "IE Ehanched Security Configuration" being enabled. When IE ESC is active, automatic detection of Local Intranet sites is not enabled.
Without the local computer being recognized as being part of the Local Intranet zone, single sign on will not work. If I manually add the computer to the list of Local Intranet sites or change the "User Authentication \ Logon" option to "Automatic logon with current user name and password" from the default "Automatic logon only in Intranet zone", single sign on will start working again.