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by douche 3758 days ago
Just a guess, but probably the sunk cost fallacy. Lync licensing is not cheap, and once you've put in the time to buy it, provision the ridiculous amounts of hardware necessary to run it, deploy it, push the client to end-users, train up on how to use it, it represents a significant investment.
1 comments

You also forgot "it's probably not his/her choice".