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OWA will not work for mailbox in non-internet facing AD site
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OWA will not work for mailbox in non-internet facing AD... - 14.Jun.2010 2:14:15 PM
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jbbrower
Posts: 4
Joined: 14.Jun.2010
Status: offline
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We have Exchange 2010 servers in 2 sites (one internet facing (site A) and the other not (site B)). If I use the main OWA (site A) to open a mailbox from site A, it works, but if the mailbox is from site B it doesn't work giving the message "Outlook Web App isn't available". The event log on the CAS server in Site A has an error that says "The Outlook Web App proxy failed because no Outlook Web App virtual directory configured for Kerberos authentication could be found in the site."
If, internally, I go directly to a CAS OWA in site B and try to open the same mailbox from site B it works fine. If you try to connect to a mailbox in site A from here, you get the normal message "Use the following link to open this mailbox with the best performance" with a link to the proper OWA in the internet facing site. (normal)
I have checked to make sure that the msExchInternalHostName (Internal URL) attribute of the Outlook Web App virtual directory exists and it matches the fully qualified domain name (FQDN) of the Client Access server. I have also even tried to go into IIS on the CAS server in site B and set the Integrated Windows authentication enabled on the Outlook Web App virtual directory. I'm stuck.
The users in Site B will need to be able to get OWA access from the internet (hence going through the CAS server in the internet facing site A) and get to their mailboxes hosted on the mailbox server in site B. Thanks in advance for all available help.
Servers in Site A (internet facing)
- Server1 (CAS, HTS) (int URL: server1.domain.AD ext URL: mail.company.com)
- Server2 (MS)
Servers in Site B (non-internet facing)
- Server3 (CAS, HTS) (int URL: server3.domain.AD ext URL: null)
- Server4 (MS)
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RE: OWA will not work for mailbox in non-internet facin... - 15.Jun.2010 8:53:38 AM
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de.blackman
Posts: 3542
Joined: 4.Apr.2005
From: Toronto, Canada
Status: offline
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In Exchange management console, what authentication methods are set on the OWA virtual directories on both servers?
_____________________________
Ibrahim Benna - Microsoft Exchange MVP
Forum Moderator
Navantis
@IbrahimBenna
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RE: OWA will not work for mailbox in non-internet facin... - 15.Jun.2010 2:14:53 PM
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jbbrower
Posts: 4
Joined: 14.Jun.2010
Status: offline
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Server 1 and server 3 are both using Forms Based Authentication. (the default)
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RE: OWA will not work for mailbox in non-internet facin... - 15.Jun.2010 3:22:27 PM
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jbbrower
Posts: 4
Joined: 14.Jun.2010
Status: offline
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Yes, Server 3 is the non-internet facing CAS server and is set to forms based authentication (default)
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RE: OWA will not work for mailbox in non-internet facin... - 16.Jun.2010 8:38:51 AM
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de.blackman
Posts: 3542
Joined: 4.Apr.2005
From: Toronto, Canada
Status: offline
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Have you tried setting OWA to use windows integrated on Server 3?
Understanding Proxying and Redirectionhttp://technet.microsoft.com/en-us/library/bb310763.aspx
_____________________________
Ibrahim Benna - Microsoft Exchange MVP
Forum Moderator
Navantis
@IbrahimBenna
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RE: OWA will not work for mailbox in non-internet facin... - 16.Jun.2010 9:14:38 AM
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jbbrower
Posts: 4
Joined: 14.Jun.2010
Status: offline
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You got it! That worked. I just turned on windows integrated authentication (which required turning off forms based), iisreset, and it worked. I had to do the same for the ecp site to make "options" in OWA to work, but now it is all good. Thanks!
btw - if you are on Expters Exchange too... put your answer here for the points there too:
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_26255277.html#a33002459
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