We finally figured out what might be the cause, seems our hidden file shares are hosted on Windows Server 2012 R2 which uses SMB 3.02 dialect, looking into the server manager a little deeper we noticed that the shares had SMB encryption enabled which is
not supported on server 2008 R2 / UAG...
Marked as answer byJulien LegerMonday, June 16, 2014 3:53 PM
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