Hi all,
I have trouble with migrating to Exchange 2013 from 2007. All went well, after few minor issues everything is up and running but we have a very annoying popup asking for credentials every time a user opens Outlook.
It's happening with Outlook versions 2007, 2010 and 2013 (I haven't tested others). I tried with a combination of DOMAIN\Username, username@domain, emailaddress@domain and nothing works, when I press OK, the Login window reappears. Then I click Cancel and Outlook opens normally, but on the status bar I get "Needs Password". Everything works (I can send and receive mails, set OOF reply, set appointments...) but when I try to download OAB it prompts me for credential again. Then I put in the credentials in format DOMAIN\username and OAB gets downloaded and status changes to Connected to: Microsoft Exchange. From that point on everything works and it never prompt for credentials again until I close and restart Outlook.
Test-OutlookWebServices completes successfully and I can manually download oab.xml via browser (it requires me to log in first, though).
I noticed an interesting entry in Outlook connection status though. When I click Cancel on credentials prompt I get only 3 connections (all are referenced to my ExchangeGUID
But then, when I try to download OAB and enter the credentials I get this:
Maybe this 4th entry with GUID 0c4bc.... is problematic and causes authentication prompt. How can I find to which object this GUID belongs? I already checked all mailboxes and none has this GUID.
I would be very grateful if someone would shed some light as I already searched through the forums and tried many solutions for similar problems but was unable to find a solution.
If you need any more information I would gladly provide it.
Thank you very much,
Miha