Hi
I'm the admin of our own hosted Exchange 2010 server. We have 1 client access server and 1 mailbox server, both running Server 2008 Std and Exchange 2010.
Running Outlook 2010 and earlier, there's absolutely no problems, no popups whatsoever. I upgraded to Outlook 2013 as one of my clients did the same and started getting popups. When you open Outlook, I get a popup - "Windows Security - Microsoft Outlook - Connecting to my e-mail address". The OK is greyed out and when I click on Cancel, Outlook shows "Need Password" in the bottom right hand corner. When I click on that, Outlook connects and works perfectly from there. When I close and re-open Outlook, same thing happens.
From other forums I checked for the two updates they mentioned, but I do not have them. I tried installing them to remove again, but they weren't even compatible with my setup. (Win 7 Ent, Office 2013 Pro). I checked the Autodiscover SSL settings under my CAS' IIS and that is set to Ignore Client Certificates.
Are there any other things I can try?