What is the domain fuctional level and Forest functional level?     Would you please check with NTCompatibility mode flag settings.     Enable  this flag (Allow cryptography algorithms compatible with Windows NT 4.0 policy)   for more details please refer the following KB:   http://kb.pulsesecure.net/InfoCenter/index?page=content&id=KB16105   Please mark this post as 'accepted solution' if this answers your question that way it might help others as well, a kudo would be a bonus thanks ... View more