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Cross Forest Free/Busy RRS feed

  • Question

  • Dear Team ,

    I just wanted to implement the cross forest availability services between  2 Forest A and B.

    Forest A - Exchange 2010 users , Office 365 users and MFG is in place

    Forest B - Exchange 2010 users , Office 365 users and MFG is in place 

    Trust has been established already.

    Could you please assist me on this


    - Sivashankar. Please mark as answer/useful if my contribution is helpful

    Wednesday, September 30, 2015 8:04 PM

Answers

  • Sivashankar,

    Assuming you have your cross-org configured correctly, if one of your users does a lookup of a user in the other forest, their client will first check their own directory for the mailbox, but will be told it's external.  It will then check to see what external organizations have a federation trust, and how it can find them. Once it figures out how to "talk to" the other forest, it will do a F&B lookup on their systems. 


    Will Martin ...
    -join ('77696c6c406d617274696e2d66616d696c6965732e6f7267' -split '(?<=\G.{2})' | ? { $_ } | % { [char][int]"0x$_" })

    • Proposed as answer by David Wang_ Monday, October 5, 2015 9:29 AM
    • Marked as answer by David Wang_ Wednesday, October 7, 2015 4:55 AM
    Friday, October 2, 2015 11:28 AM

All replies

  • Hi,

    I noticed trust has been established during the forest .

    I suggest you can have a look at the following links to finish the configuration :

    http://blogs.technet.com/b/exchange/archive/2011/03/04/3412075.aspx

    https://technet.microsoft.com/en-us/library/bb125182.aspx

    Regards,

    David 

    Thursday, October 1, 2015 3:30 AM
  • Dear David ,

    Thanks for your reply , i just wanted to know can we achieve the solution (free/busy) between two forest without using GAL Sync or FIM.

    I found some article about this 

    http://blogs.technet.com/b/exchange/archive/2011/06/28/cross-org-availability-using-federation-trust-and-organization-relationship.aspx

    Please check and let me know 


    - Sivashankar. Please mark as answer/useful if my contribution is helpful

    Thursday, October 1, 2015 8:08 PM
  • Sivashankar, your own link shows how to do what you are asking.  From your link:

    Note: Directory synchronization is not required in order to do cross-org availability in Exchange 2010 SP1, except if you have users on Outlook 2007/2003. However, if you choose to configure directory synchronization, it'll not impact the ability to perform availability lookups.


    Will Martin ...
    -join ('77696c6c406d617274696e2d66616d696c6965732e6f7267' -split '(?<=\G.{2})' | ? { $_ } | % { [char][int]"0x$_" })

    Thursday, October 1, 2015 8:14 PM
  • Dear Will Martin , 

    Forget to update the details on the above post  , I just wanted to know how it will retrieve  the info of forest B user from Forest A.

    Need  to know about the communication flow and how it will work for migrated office365 user.


    - Sivashankar. Please mark as answer/useful if my contribution is helpful

    Thursday, October 1, 2015 8:24 PM
  • Sivashankar,

    Assuming you have your cross-org configured correctly, if one of your users does a lookup of a user in the other forest, their client will first check their own directory for the mailbox, but will be told it's external.  It will then check to see what external organizations have a federation trust, and how it can find them. Once it figures out how to "talk to" the other forest, it will do a F&B lookup on their systems. 


    Will Martin ...
    -join ('77696c6c406d617274696e2d66616d696c6965732e6f7267' -split '(?<=\G.{2})' | ? { $_ } | % { [char][int]"0x$_" })

    • Proposed as answer by David Wang_ Monday, October 5, 2015 9:29 AM
    • Marked as answer by David Wang_ Wednesday, October 7, 2015 4:55 AM
    Friday, October 2, 2015 11:28 AM