What happened to the concurrent sessions feature in XP SP2?
It’s gone. In February 2003, internal Microsoft documentation described a feature planned for XP SP2 called “concurrent sessions.” This would have enabled XP Professional Edition systems with Fast User Switching (FUS) enabled (i.e., non-domain systems) to support two concurrent interactive users. The current XP version is limited to one interactive user at a time; this user can be sitting at the XP machine locally or connecting to it remotely through Remote Desktop Connection (RDC), Microsoft’s desktop version of Windows Terminal Services. Under the original plan for XP SP2, XP Pro would have supported two users, one local and one remote. This capability would have accomplished two goals. First, it would further differentiate XP Pro from XP Home Edition (an ongoing concern in Redmond) and make the more expensive XP Pro more enticing to users. Second, this feature would make Smart Displays more functional; under the current scheme, when a user accesses his or her XP Pro desktop from a S
