Exchange 2013 GALSYNC

Prakash Modak 91 Reputation points
2021-03-03T18:02:09.183+00:00

Hello,
we have two exchange installations in two forests , the AD trust is the domain level two way trust.
i want to hav GAL synced between two exchanges so that i can get free/busy services.

can anyone please help me?

Thanks
Prakash

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Kael Yao-MSFT 37,491 Reputation points Microsoft Vendor
    2021-03-04T07:05:15.93+00:00

    Hi, Prakash.

    You may use (MIM)Microsoft Identity Manager to perform a galsync between the forests.
    It needs a SQL server in your environment.

    About the detailed steps, you may refer to this article:
    Using Microsoft Identity Manager Synchronisation Server's Global Address List Synchronisation feature to create a shared global address book across three Exchange Forests
    (Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. )

    Once the galsync succeeded, you may see mailboxes in another forests synced in the specific OU and appear as "cross-forest mail contact" in EAC>contacts.
    74162-57.png

    About configuring the free/busy(availability) service, there is also a Microsoft document: Configure the Availability service for cross-forest topologies
    And since you are using Exchange 2013, there are some additional steps introduced in this KB: Cross forest free/busy lookup fails when target forest is Exchange Server 2013 or Exchange Server 2016

    If the response is helpful, please click "Accept Answer" and upvote it.
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  2. Prakash Modak 91 Reputation points
    2021-03-04T14:37:02.933+00:00

    Thank you for the Quick response :) ,

    Regarding GALsync , MIM i need to purchase a license and i'm looking for something free :)

    we have acquired a company and it came with a complex IT setup or i would say misconfigured setup.
    the complication with us is, both forests are using the same UPN suffix ( though Domain Name is different)

    Forest A (domain name qwe.local) , has 5 UPN suffix, one of which (abc.com) which used for user login(user1@jaswant .com) .
    Forest B (domain name ABC.com) has by default user11@jaswant .com id.

    now i'm stuck with free/busy not woking, as the trust is domainwide two way (not forest) but no GALSYNC
    i tried creating mail contact manually to test but it's not working

    i've followed the Technet article for Free/busy configuration.
    https://social.technet.microsoft.com/wiki/contents/articles/28332.steps-to-configure-cross-forest-availability-between-two-exchange-forests-in-exchange-2013.aspx

    i'm sorry, i started my question with GALSYNC and now asking about free/busy....

    Thanks
    Prakash