Cross Forest Free/Busy Info
Hi guys I have 2 Windows 2003 domains there are no trusts between them. Domain A is your typical setup, hosts Exchange 2k7, users, computers and so on. Domain B is a typical setup as well, but no Exchange environment and contains users and computers. Users in Domain B log into Domain B and can access resources and so on, they also have an account in Domain A and have a Exch 2k7 mailbox. Users that log into domain B have Outlook 2k7 installed, when they open Outlook, it prompts them for their credentials which is what I would expect, they put in their domainA\username information and they are in. Now here is where the problem starts as mentioned in the title, they go to create an appointment and they cannot see anyone elses free/busy information. I have looked around and I have found a few articles on this issue from: http://technet.microsoft.com/en-us/library/bb125182(EXCHG.80).aspx and http://technet.microsoft.com/en-us/library/bb125182.aspx This seems like a real pain, and a lot of work to get this to work. Am I going down the wrong path here? If not, anyone have step-by-step instructions they have used and would be willing to share? Any sugestions, besides collapse Domain B into A or create a trust. Thanks! Mike
August 18th, 2010 4:23pm

Hi, For free/busy information between domain, u can deploy Federation server, detail Here is a paragraph I read: "In Exchange 2007, you could share calendar data with other Exchange 2007 organizations. Doing so meant that your CAS servers had to talk to their calendar servers, and the controls around it were not that granular. In order to do it, you either needed to establish a forest trust and grant permissions to the other forest’s CAS servers (to get detailed per-user free/busy information) or set up a separate user in your forest for the foreign forests to use (to get default per-org free/busy data). You also have to fiddle around with the Autodiscover service connection points and ensure that you’ve got pointers for the foreign Autodiscover SCPs in your own AD (and the foreign systems have yours). You also have to publish Autodiscover and EWS externally (which you have to do for Outlook Anywhere) and coordinate all your certificate CAs. While this doesn’t sound that bad, you have to do these steps for every single foreign organization you’re sharing with. That adds up, and it’s a poorly documented process " http://blogs.3sharp.com/deving/archive/2009/08/21/some-thoughts-on-fba-part-2.aspx It points off to this topic about the Availability service. http://technet.microsoft.com/en-us/library/bb125182.aspx Ripu Daman Mina | MCSE 2003 & MCSA Messaging
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August 18th, 2010 5:21pm

Hi, Your scenairo is Account forest and Exchange resource forest, that could be recogized as the linked email. To make free/busy available, you should ensure the autodiscover service is working fine in the Account Forest. http://msexchangeteam.com/archive/2008/02/13/448127.aspx After the autodiscover is avaiable in the Account forest, the free/busy request can be sent to the Availability Service which can access each calendar folder of the mailbox to get the free/busy. Thanks Allen
August 23rd, 2010 11:13am

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