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Network Security - Minimum Session Security for NTLM SSP Based can set to No Minimum in Lync Edge Servers? RRS feed

  • Question

  • Hi,

    We created a Skype Bot using UCMA framework which is able to connect to Lync Edge Server through Internal Network (Corporate N/W) but when we try to Access from External Network we are getting the below error in Edge Server

    "User authentication with NTLM protocol failed with error SEC_E_UNSUPPORTED_FUNCTION

    Ensure that the "Network security: Minimum session security for NTLM SSP based (including secure RPC) clients" policy settings on the computers from which users log on are the same as "Network security: Minimum session security for NTLM SSP based (including secure RPC) servers" policy settings on this server. "

    We got the below difference b/w Client & Server:

    Client:

    Network Security - Minimum Session Security for NTLM SSP Based - No Minimum

    Server:

    Network Security - Minimum Session Security for NTLM SSP Based - Require NTLMv2 session security, Require 128-bit Encryption 

    So is that fine if we disable the NTLM security in Lync Edge Server? since we are not authorized to enable this on Client Machine.

    Can we By Pass this NTLM Security in UCMA Framework?

    Please provide some suggestions.

    Thanks,

    Roopan

    Tuesday, October 16, 2018 12:26 PM

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