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multiple domains in one Exchange server

    Question

  • Hi All,

    After reading a lot of articles and forums, I think I need more help here.

    Current system: Exchange 2010 R2, no Edge Transport. 

    our main domain is maindomain.com, so far everything works as expected.

    we are setting up another website  i.e. seconddomain.com which we have MX record, SSL for that website etc.

    is it possible to configure existing Exchange server to handle seconddomain.com along with maindomain.com?

    meaning that if I create an user jsmith@seconddomain.com, he should be able to send/receive emails from internally and externally.

    What I have done is create an accepted domain in Exchange server 2011 for seconddomain.com. From here I don't know which way ? Email Address policy i.e. only viable for internally, or pointing MX record of seconddomain.com which I have not tried.

    Any help would be appreciated.

    Regards

    Wednesday, July 17, 2013 5:45 AM

Answers

  • Hi,

    Yes you can do that.

    Create new accepted domain (seconddomain.com) in Exchange 2010. Create/Modify the email address policy.

    Create New mailbox with seconddomain.com email address.

    Do you have any other gateway like Symantec, FOPE?

    If you have any gateway server you can NAT the public IP address with Internal gateway for email routing.

    If you don't have any gateway server still you can NAT the seconddomain.com Public IP address to Internal Hub transport server.

    Once everything setup try to send email for external and troubleshoot further.

    Regards


    Gangaiyan.M Enterprise Messaging Administrator-Exchange 2010. Windows 2008 Active Directory Configuring. If my answer helped you, Mark it as Propose as answer http://exchangeexpertscommunity.blogspot.in/

    Wednesday, July 17, 2013 7:05 AM
  • Hi,

    An MX record in public DNS is required for each SMTP domain for which you accept email from the Internal. Please make sure MX record should resolve to the Internet-facing server that receives email for your organization.

    You also need to configure Send connectors and Receive connectors so your Exchange organization can send email to and receive email from the Internet.

    For details about Multiple Authoritative Domains:

    http://technet.microsoft.com/en-us/library/aa996314(v=exchg.141).aspx


    Kent Huang
    TechNet Community Support

    Friday, July 19, 2013 9:57 AM
  • Hi,

    1. First register Seconddomain.com in Public DNS, It will take 24 hours to replicate across the Public DNS world.

    2. Create Internet Send Connector in Exchange.

    3. Create/Modify the email address policy.

    4. NAT the Public IP address of seonddomain.com to Internal Exchange Hubtransport server or If you using any gateway server (ProofPoint, Symantec Gateway, FOPE) Point the NAT with it.

    4. Create new mailbox using seconddomain.com as primary email address and verify the routing.

    Regards


    Gangaiyan.M Enterprise Messaging Administrator-Exchange 2010. Windows 2008 Active Directory Configuring. If my answer helped you, Mark it as Propose as answer http://exchangeexpertscommunity.blogspot.in/

    Saturday, July 20, 2013 6:49 AM

All replies

  • Hi,

    Yes you can do that.

    Create new accepted domain (seconddomain.com) in Exchange 2010. Create/Modify the email address policy.

    Create New mailbox with seconddomain.com email address.

    Do you have any other gateway like Symantec, FOPE?

    If you have any gateway server you can NAT the public IP address with Internal gateway for email routing.

    If you don't have any gateway server still you can NAT the seconddomain.com Public IP address to Internal Hub transport server.

    Once everything setup try to send email for external and troubleshoot further.

    Regards


    Gangaiyan.M Enterprise Messaging Administrator-Exchange 2010. Windows 2008 Active Directory Configuring. If my answer helped you, Mark it as Propose as answer http://exchangeexpertscommunity.blogspot.in/

    Wednesday, July 17, 2013 7:05 AM
  • Hi,

    An MX record in public DNS is required for each SMTP domain for which you accept email from the Internal. Please make sure MX record should resolve to the Internet-facing server that receives email for your organization.

    You also need to configure Send connectors and Receive connectors so your Exchange organization can send email to and receive email from the Internet.

    For details about Multiple Authoritative Domains:

    http://technet.microsoft.com/en-us/library/aa996314(v=exchg.141).aspx


    Kent Huang
    TechNet Community Support

    Friday, July 19, 2013 9:57 AM
  • Thank you so much for all responses.

    Kent your direction is the way I was thinking. with the send and receive connectors, I cannot think of how to achieve it. If you could tell me a bit more in detail that would be appreciated.

    Regards

    Friday, July 19, 2013 10:21 AM
  • Hi,

    1. First register Seconddomain.com in Public DNS, It will take 24 hours to replicate across the Public DNS world.

    2. Create Internet Send Connector in Exchange.

    3. Create/Modify the email address policy.

    4. NAT the Public IP address of seonddomain.com to Internal Exchange Hubtransport server or If you using any gateway server (ProofPoint, Symantec Gateway, FOPE) Point the NAT with it.

    4. Create new mailbox using seconddomain.com as primary email address and verify the routing.

    Regards


    Gangaiyan.M Enterprise Messaging Administrator-Exchange 2010. Windows 2008 Active Directory Configuring. If my answer helped you, Mark it as Propose as answer http://exchangeexpertscommunity.blogspot.in/

    Saturday, July 20, 2013 6:49 AM