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Exchange 2013 and Outlook not authenticating

Posted on 2013-06-04
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Last Modified: 2013-06-09
Hi all,

I've just installed two new Exchange 2013 servers; 1 x mailbox and 1 x CAS. I cannot get Outlook to authenticate to the server. It just keeps asking for credentials and does not progress (even though the credentials are correct).

OWA works fine, and all tests pass on ExRCA. ActiveSync also works fine. I've tried this with Outlook 2013 and Outlook 2010, internal and external to the environment - nothing works here.

I initially had an issue with RPC which required reinstalling. It still doesn't appear to be listening on 6001 after running a netstat, and I know EX2013 relies heavily on RPC so perhaps this is my problem? Can anyone confirm if this is still required in Exchange 2013?
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Question by:Logic-Networks
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Expert Comment

by:Amit
ID: 39219371
Exchange 2013 uses RPC over HTTP now. So you need to setup Outlook client.

http://msexchangeguru.com/2013/01/10/e2013-outlook-anywhere/
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Author Comment

by:Logic-Networks
ID: 39219463
Hi amitkulshrestha,

I've already done that. All is configured as per instructions.

Everything works on TestExchangeConnectivity.com (ExRCA) so it's something to do with authentication, RPC or something along those lines.
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Accepted Solution

by:
Logic-Networks earned 0 total points
ID: 39221063
This has been resolved. The problem was with the DefaultLoopbackCheck in IIS. Here are the articles I found to help:

http://www.information-worker.nl/2009/10/30/event-id-4625-an-account-failed-to-logon-solution/

http://support.microsoft.com/kb/896861 (applied Method 2)
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Author Closing Comment

by:Logic-Networks
ID: 39232774
Resolved the problem myself.
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