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Druva Documentation

Unable to register AD server with inSync server

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This article explains the steps to perform in case of the following error.


"Cannot register the AD server.  Strong(er) authentication required."

Following traceback is seen under the inSyncSyncServer.log

[2014-07-28 04:43:26,808] [ERROR] Error <class 'inSyncLib.inSyncError.SyncError'>:Strong(er) authentication required (#10000007f). Traceback -Traceback (most recent call last):
File "inSyncWWWLib\ActiveDirectory.pyc", line 206, in add
File "inSyncLib\inSyncRPC.pyc", line 1626, in call
File "inSyncLib\inSyncRPC.pyc", line 1610, in __safe_request
File "inSyncLib\inSyncRPC.pyc", line 1554, in _safe_request
File "inSyncLib\inSyncRPC.pyc", line 1546, in execute
File "<string>", line 1, in <module>
File "xmlrpclib.pyc", line 1224, in call
File "inSyncLib\inSyncBaseRPC.pyc", line 672, in __safe_request
File "inSyncLib\inSyncBaseRPC.pyc", line 757, in __issue_request
SyncError: Strong(er) authentication required (#10000007f)


Log in to the AD Server and perform the following steps

  1. Open Group policy manager.
  2. Edit the Domain Controller Policy
  • Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options
  1. Look for the below two entries-
  • Domain Controller: LDAP Server signing requirements.
  • Network security: LDAP Client signing requirements
  1. Make sure these entries are set to the following values-
  • Domain controller: LDAP server signing requirements = none
  • Network security: LDAP client signing requirements = Negotiate
  1. In some environments the entry "Domain controller: LDAP server signing requirements" is set to "Require Signing".


  1. Change it to "none" and run a GPUPDATE /FORCE on the AD Server.


  1. Try to register the AD server again from the Console and this time you should be able to register it successfully.

Reference article:<wbr/>en-us/library/cc778124(v=ws.<wbr/>10).aspx