UPDATE: 3/11/2007
Normally, I don’t post updates on the basis of communications from others because… well… I deliberately discard most communications from any individuals other than my customers. (Guys, I get enough mail from my actual customers as it is, much less from the occasional passers-by hence the reason there’s no actual "mailto:’ information anywhere on my blog.)
But in fairness to the folks that make UserLock since I did unintentionally but somewhat implicitly put something of a shroud of doubt around the scalability of their product, I was contacted by the CEO of IS Decisions, the makers of UserLock, who wanted to tell me that their product is in place at the US Dept of Justice which has 30,000 desktops. (http://www.isdecisions.com/en/software/userlock/customer-references.cfm) His point is obviously that UserLock could in fact scale to larger customers based on their references.
Again, I have no personal experience with their product from a scalability perspective but I figured, I should at least let folks know that based on their CEO’s communication, they do seem to recognize & appreciate the importance of Enterprise scalability. Nice.
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ORIGINAL POST:
There’s a tool that I found, and I haven’t tested it much but it seems rather promising at least for smaller groups. It’s called Userlock and it tracks, notifies, and reports the logon/logoff activity of your domains. It gives you the ability to limit the number of simultaneous connections under the same user name on an entire Windows NT/2000/2003 network.
I’m not sure how this product scales but it could be useful for certain groups that want to ensure that a people don’t leave themselves logged in at the console of multiple machines.
Kurt Shintaku's Blog 