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I having difficulty setting up pidgin to work with my company's microsoft 365's communicator lync 2013 (not 2010) account.



I either receive a message stating authentication failed, or Incompatible authentication scheme chosen: NTLM depending upon the user agent values used from this wiki



It appears that both the user agent values that start with UCCAPI provide authentication failed error, which I'm guessing is "closer" to the solution.



I have triple checked that the password is correct.



Below are some images of my settings (I have changed the company name to "company" for annonymity.



enter image description here
enter image description here



I am running pidgin with a script in order to fix a write error issue:



export NSS_SSL_CBC_RANDOM_IV=0

pidgin -d


I am also using the latest version of SIPE (1.10.1) by using this ppa: https://launchpad.net/~aavelar/+archive/ppa



What settings do I need to change/add to get it to work?


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 Answers
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I was able to get this working on ubuntu 13.04 (question asked on ubuntu 12.04). Here are a few pointers:



Use the full user agent string as @mason81 pointed out: 



UCCAPI/15.0.4420.1017 OC/15.0.4420.1017 (Microsoft Lync)


I did not need to use a startup script to solve any write errors. e.g.



export NSS_SSL_CBC_RANDOM_IV=0

pidgin -d


That linked repo was pointless on this distro, don't use it. It appears that on Ubuntu 13.04 you will install pidgin-sipe 1.13.3-1 by default which is an even more up-to-date version.



It appears that the pidgin/sipe setup I have installed here has a third authentication type for TLS as seen in this picture which is what I needed.
enter image description here





For reference, here are my connection settings that are working:
enter image description here
enter image description here



The other tabs are the defaults





Update



To get this working in ubuntu 14.04, do exactly the same, but untick the single sign on!


[#28982] Tuesday, May 4, 2021, 3 Years  [reply] [flag answer]
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