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Exchange 2010/2007 external OWA

Posted on 2013-12-17
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Last Modified: 2014-07-01
Background. 4 sites in AD. The one site is central in a datacentre. The three branches have Exchange 2007/Windows 2003. The Datacentre has Exchange 2010/Windows 2008.

I am trying to configure the Datacentre OWA to be the central point with a central name for all external users to connect to.

The firewall between all sites internally is completely open. All sites have Digicert ceritifcate. And installed correctly.

Active Directory Sites and Subnets are definitely configured correctly. I have tried enabling Integrated Auth via both console and poswershell.

But I still get:

Outlook Web App isn't available. If the problem continues, please contact your helpdesk.

The event viewer on the datacentre server throws this up:

The Client Access server "https://webmail.domainname.co.za/owa" attempted to proxy Outlook Web App traffic for mailbox "/o=domainname/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=username". This failed because no Client Access server with an Outlook Web App virtual directory configured for Kerberos authentication could be found in the Active Directory site of the mailbox.

Previously, webmail used to sit on the largest sites 2007 server as a seperate owa folder for external access and it worked fine with no issues for all other sites.

Any ideas?
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Question by:xpandit
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8 Comments
 

Author Comment

by:xpandit
ID: 39723704
The owa external url for the three 2007 sites is also blank - configured via console.
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LVL 12

Expert Comment

by:mattclarified
ID: 39724183
Hi,

 Can you run it through the Microsoft remote connectivity tester and let us know what you get back.

https://testconnectivity.microsoft.com/

M@
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Author Comment

by:xpandit
ID: 39724291
Excuse the ignorance - but this question is for OWA? There isn't an OWA test there?
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LVL 14

Expert Comment

by:plug1
ID: 39726017
Web services will give you the output you need.
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Author Comment

by:xpandit
ID: 39745686
ErrorNoRespondingCASInDestinationSite: Exchange Web Services are not currently available for this request because none of the Client Access Servers in the destination site could process the request.
0
 

Author Comment

by:xpandit
ID: 39745688
There definitely is a CAS in the site. Acive Directory Sites are configured correctly. The Exchnage servers are showing in Sites and Services under the correct site. There is also a Digicert ceritificate installed on each Exchnage server in the domain.
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Accepted Solution

by:
xpandit earned 0 total points
ID: 40161787
We solved this by upgrading the other sites Exchange server.
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Author Closing Comment

by:xpandit
ID: 40169050
Workaround
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