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Lync Egde with Lync client in windows XP

Lync client on Windows XP Sp3 doesn’t authenticate with Lync server Edge (Remote users). Windows 7 able to support NTLM Authenticate but Windows XP does not support 128-Bit encryption. So that we will do following.

You have to remove Mark "Require 128-bit Encryption". 

Guide:  Run secpol.msc on Lync Front End server.
          Select Local Policies then Security Options
Set the following values to "No Minimum."
          Network Security: Minimum session security for NTLM SSP based (including secure RPC
          Network Security: Minimum session security for NTLM SSP based (including secure RPC) servers


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