We're experiencing an issue with some machines, after an AD sync occures there is a dupelicate unmanaged machine created. Even if I delete the unmanaged machine, next AD sync it shows up again. I found this article that said the bug was fixed in version 4.7 but we are on version 5.2
http://www.sophos.com/en-us/support/knowledgebase/1462/7800/1471/8850/111697.aspx
This is happening with probably 100 machines.
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