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Is NTLM authentication still needed for Exchange 2013

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Is NTLM authentication still needed for Exchange 2013 - 2.Nov.2016 9:32:47 PM   
hunglikethor

 

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Joined: 13.Oct.2006
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Is NTLM still needed for Exchange 2013?

I have my group policies set to only accept NTLMv2, and reject all else.

My domain controllers (Windows 2012R2 domain controllers, windows 2012r2 native forest/domain) are set up via GPO to reject NTLM and only use Kerberos&LDAP.

Does this security posture cause any issues? I have Exchange 2010 servers as well, and they do not seem to be bothered by my GPO settings.

Does Exchange 2013 require a more insecure active directory domain than Exchange 2010?

REason I am asking this is that a Microsoft support person is troubleshooioting my inability to create a DAG cluster. He wants me to change the "lmcompatibility" registry key to accept less secure authentication.
Post #: 1
RE: Is NTLM authentication still needed for Exchange 2013 - 24.Apr.2017 8:54:01 PM   
visionviper

 

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Joined: 24.Apr.2017
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The only thing I am aware this would impact would be client access. As long as all of your clients can do NTLMv2 then there should be no problems.

(in reply to hunglikethor)
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RE: Is NTLM authentication still needed for Exchange 2013 - 15.Sep.2017 10:31:19 AM   
BeTaCam

 

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Joined: 24.Feb.2003
From: India
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Yes. There is a dependency on DAG's

(in reply to hunglikethor)
Post #: 3

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