Hosting multiple companies on same Exchange Server - Exchange Server 2010 RRS feed

  • Question

  • Dear Experts,

    Currently  we have a Exchange 2010 SP2 Enterprise (2 HUB/CAS and 2 MB with CAS Array and DAG ) organization . Our plan is host one of our subsidiary companies mail boxes on our exchange organization. This should work like a small scale hosting .>

    1. There is any possibility to implement two isolated GAL’s for these companies ?

    2. What’s the best method to host two different companies in  a single Exchange 2010 SP2 Enterprise organization?

    3.In implementation  stage we can expect any issues in current production ?

     Thanks in advance 



    Wednesday, September 12, 2012 5:59 PM


  • Hi CK,


    • Set up Public DNS MX record for each SMTP domain for which you accept e-mail from the Internet. Each MX record should resolve to the Internet-facing server that receives e-mail for your organization.
    • Send and Receive connectors should be configured, so that the Exchange organization can send e-mail to and receive e-mail from the Internet.

    Create Accepted Domains:

    New-AcceptedDomain -Name "domain1" -DomainName domain1.com -DomainType Authoritative

    Create Accepted Domains for every domains

    Now we need to configure the email address policy for the newly created authoritative domains:

    New-EmailAddressPolicy -Name “EPolicyDomain1” -IncludedRecipients UserMailbox -ConditionalDepartment “Recipient Container name” -Priority 1 -EnabledEmailAddressTemplates “SMTP:@domain1.com”

    Apply the email address Policy:

    Update-EmailAddressPolicy -Identity “EPolicyDomain1"

    Read here for implementing multiple GALs (GAL Segmentation): http://technet.microsoft.com/en-us/library/hh529948.aspx

    Regards from ExchangeOnline | Windows Administrator's forums

    Thursday, September 13, 2012 2:37 AM