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Hosting owa for multiple domains

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Hosting owa for multiple domains - 21.Sep.2010 9:08:38 PM   
whatupe

 

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I am running Exchange 2007 (with the possibility of upgrading to 2010), and I'm trying to figure out how to run OWA in a multiple domain environment.  So, for example, I have users in one domain abc.com, and others in another domain def.com.  I want users in abc.com to access owa.abc.com, and authenticate with their abc credentials, and users in def.com to acccess owa.def.com and authenticate with their def credentials.

Is this possible, and if so, what does the minimum configuration look like?  Right now i'm running everything on a single machine (for a single domain), and i'd like to set up as few actual exchange environments as possible and reuse environments if possible.  For example, maybe I can set up two client access servers and a single mailbox server?
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RE: Hosting owa for multiple domains - 27.Sep.2010 10:33:17 PM   
whatupe

 

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Anyone have any advice on this?  Any help is much appreciated.

(in reply to whatupe)
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RE: Hosting owa for multiple domains - 1.Oct.2010 10:33:10 AM   
travis.sheldon

 

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Its certainly possible..you'll first need to create a new website in IIS for def.com, then just use Exchange Shell to create a new OWAVirtualDirectory with the -WebSiteName parameter (The name of the newly created IIS site for def.com)

New-OWAVIrtualDirectory -Name "dcf.com OWA" -WebSiteName "dcf.com"


Then you'll just use shell or EMC to copy the authentication settings and then import a new certificate for the site through shell..just do not use enable-exchangeservices..instead, set the SSL on the site itself in IIS

(in reply to whatupe)
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RE: Hosting owa for multiple domains - 6.Oct.2010 4:32:48 PM   
whatupe

 

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How will the site know to allow users from a domain different than the one the machine exists within?

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RE: Hosting owa for multiple domains - 7.Oct.2010 11:22:39 AM   
travis.sheldon

 

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Can you explain your question a bit more? The OWA site is just a front end, so it'll be able to authenticate any user in active directory with a mailbox..the only thing you get from creating multiple OWA sites is the ability to brand each one with a unique SSL and FQDN

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RE: Hosting owa for multiple domains - 7.Oct.2010 1:57:53 PM   
whatupe

 

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My question is regarding users within different domains: abc.com and def.com. So there are two different Active Directory trees. The exchange server lives on domain abc.com. How will the new site, owa.def.com, know how to authenticate users from the def.com domain.

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RE: Hosting owa for multiple domains - 7.Oct.2010 2:33:01 PM   
travis.sheldon

 

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I would imagine if they're in the same forest, it wont run into any issues. If you created them as completely separate AD installations, then you'll have to setup a trust relationship before you can do authentication.

Then, I'm pretty sure you'll use linked mailboxes to associate the mailbox in "def.com" to the user in "abc.com"

Am I understanding your setup correctly?

(in reply to whatupe)
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RE: Hosting owa for multiple domains - 7.Oct.2010 2:40:11 PM   
whatupe

 

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Not quite...I would not want to link mailboxes from one domain to users in another...I want to reuse existing infrastructure (mailboxes, CAS, etc) to esentially host two separate domains. Users in domain abc.com would be able to go to owa.abc.com and log in as abc\userX. Users in domain def.com would be able to go to owa.def.com and log in as def\userY.

That being said, I have complete control of the domains. I can create a single forest, and I can create a trust between the domains, so whatever the recommended approach with regards to Active Directory may be, I can get there. Once I have AD in place, it's the steps needed on the exchange side that are still fuzzy to me.

I want complete separation of domains at the exchange level as far as the end user is concerned, but internally, I have complete control. It seems odd to me that I could just set up a new owa website and have users from a particular domain use that website. It seems to me that a completely separate CAS would be needed, but I could be wrong, and so that's where I'm looking for guidance.

(in reply to travis.sheldon)
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RE: Hosting owa for multiple domains - 21.Oct.2010 2:10:20 AM   
camron

 

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< Message edited by camron -- 21.Oct.2010 3:57:17 AM >

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