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Lync Mobility can't sign-in from internal WiFi RRS feed

  • Question

  • As far as I can tell from researching on this topic, the internal DNS record of lyncdiscoverinternal is not that important. Internal wifi connected mobile devices will try to connect to lyncdiscover through the external side of the TMG. Now for me, external mobile devices connect no problem. I can nslookup the lyncdiscover DNS record from external networks. But from the internal network, I can't seem to nslookup the lyncdiscover DNS record. Would this be why mobile devices connected to internal WiFi are not able to sign-in to Lync mobility service?


    me

    Tuesday, March 13, 2012 1:02 PM

Answers

  • Hi,evesoft,

    You should make the internal DNS record for external web services FQDN pointed to internal IP of TMG instead public IP.Below is the original statement in the above article:

    "If for whatever reason, you cannot hairpin the traffic so the internal WIFI network can communicate to the external web services public IP address, would be to point the external web services FQDN that is located in Internal DNS to the Internal IP address of your Reverse Proxy Server.  With this mechanism, when the Mobile Client while connected to WIFI gets the external Web Services FQDN while on Internal DNS, they will get a private IP response and connect to Reverse Proxy in that fashion.  When an internet connected mobile device gets the Autodiscover Response and does a DNS lookup, they will receive the Public IP address of External Web Services"

    B/R

    Sharon


    Sharon Shen

    TechNet Community Support

    ********************************************************************************************************************************************************************* Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.


    • Edited by Sharon.Shen Thursday, March 15, 2012 7:47 AM grammer error
    • Proposed as answer by Sharon.Shen Friday, March 16, 2012 1:10 AM
    • Marked as answer by Sharon.Shen Thursday, March 22, 2012 10:49 AM
    Thursday, March 15, 2012 7:46 AM
  • This article should clear up the internal wifi process and give you some options:

    http://www.shudnow.net/2012/03/12/using-lync-2010-mobility-on-your-corporate-wifi-networks/ 


    Tim Harrington | MVP: Lync | MCITP: EMA 2007/2010, Lync 2010, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington

    • Proposed as answer by Sharon.Shen Thursday, March 15, 2012 7:40 AM
    • Marked as answer by Sharon.Shen Thursday, March 22, 2012 10:49 AM
    Tuesday, March 13, 2012 1:03 PM

All replies

  • This article should clear up the internal wifi process and give you some options:

    http://www.shudnow.net/2012/03/12/using-lync-2010-mobility-on-your-corporate-wifi-networks/ 


    Tim Harrington | MVP: Lync | MCITP: EMA 2007/2010, Lync 2010, MCTS: OCS | Blog: http://HowDoUC.blogspot.com | Twitter: @twharrington

    • Proposed as answer by Sharon.Shen Thursday, March 15, 2012 7:40 AM
    • Marked as answer by Sharon.Shen Thursday, March 22, 2012 10:49 AM
    Tuesday, March 13, 2012 1:03 PM
  • We have public CA certificate installed for all Lync servers. I'm now guessing (after reading through the article) I need to create an internal DNS record of the external web services FQDN pointing to the public IP of the TMG?

    me

    Tuesday, March 13, 2012 1:35 PM
  • Hi,evesoft,

    You should make the internal DNS record for external web services FQDN pointed to internal IP of TMG instead public IP.Below is the original statement in the above article:

    "If for whatever reason, you cannot hairpin the traffic so the internal WIFI network can communicate to the external web services public IP address, would be to point the external web services FQDN that is located in Internal DNS to the Internal IP address of your Reverse Proxy Server.  With this mechanism, when the Mobile Client while connected to WIFI gets the external Web Services FQDN while on Internal DNS, they will get a private IP response and connect to Reverse Proxy in that fashion.  When an internet connected mobile device gets the Autodiscover Response and does a DNS lookup, they will receive the Public IP address of External Web Services"

    B/R

    Sharon


    Sharon Shen

    TechNet Community Support

    ********************************************************************************************************************************************************************* Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.


    • Edited by Sharon.Shen Thursday, March 15, 2012 7:47 AM grammer error
    • Proposed as answer by Sharon.Shen Friday, March 16, 2012 1:10 AM
    • Marked as answer by Sharon.Shen Thursday, March 22, 2012 10:49 AM
    Thursday, March 15, 2012 7:46 AM
  • We are now in 2014 and just came upon this problem now.

    My Iphone and Android connect on 4G but when on Wifi they throw up error messages that dont even register in the logs.

    I already have my External web services FQDN pointing to the Public IP of the Reverse Proxy. Dont know what else to do ...help ?


    Richard Ojel...

    Tuesday, August 5, 2014 8:32 PM
  • Hi,

    Issue was the same for me and the problem was i forgot to add the Internal IP to the the TMG servers listener that was applying to the rule. Silly but might be what someone else missed


    http://www.scotmas.com

    Friday, July 24, 2015 12:42 PM