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Pluppo_72680's avatar
Pluppo_72680
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Jun 03, 2014

Second authentication prompt when accessing Exchange 2013 Outlook Web app using BigIP LTM.

We are deploying Exchange 2013 loadbalanced behind BigIP (running 11.3). I have used the newest iApp (f5.microsoft_exchange_2010_2013_cas.v1.3.0) to make the configuration. We are only using LTM and ...
application delivery
devops
iApps
LTM
microsoft
  • mikeshimkus_111's avatar
    mikeshimkus_111
    Jun 03, 2014

    Hi Pluppo, is it possible for you to use the IE Developer Tools' (F12) network facility or an application like Fiddler or HTTPWatch to identify the resource that responds with the 401 status after you have logged in? My guess is that it's ECP, since that's most closely related to OWA. On the Client Access servers, do you have OWA and ECP authentication types both set to forms-based for all servers?

     

    thanks

     

    Mike

     

Pluppo_72680's avatar
Pluppo_72680
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Jun 04, 2014

Hi Mike,

 

The Exchange administrator checked the CAS servers and indeed one of the servers had ECP authentication set to basic. He also found another server that had basic authentication on OWA, we thought it was set to forms on all servers.

 

Thank you for pointing us in the right direction, everything is working great now!

 

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