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Adding Authoritave Domains and Changing Primary Email Address RRS feed

  • Question

  • Our agency needs to change our email address from domain1.org to domain2.org. Our AD domain is domain1.org. We want to be able to send and receive email as domain2.org.

    From reading this article https://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx it seems pretty easy to do this. My concern is that we need to be able to have users login using their domain1.org AD accounts but have their SMTP domain be domain2.org. Is this possible?


    Orange County District Attorney

    Thursday, October 1, 2015 6:26 PM

Answers

  • What we want to do have is to keep our existing AD infrastructure domain of domain1.org and then have users login to that domain as user@domain1.org. We'd like for them to send and receive email as domain2.org however. Is that possible?

    Orange County District Attorney


    Hi Sandy, Yes. You can do that defintely. Just be aware that if you change the primary SMTP address, and users then think that is also their Logon Name, it wont work for them. Hence the recommendation to make the UPN and primary SMTP address match.

    Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Marked as answer by David Wang_ Friday, October 23, 2015 8:37 AM
    Thursday, October 1, 2015 8:13 PM
  • Don't forget to create a new autodiscover.domain2.org externally and have this resolve to your Exchange server. The new name autodiscover.domain2.org also needs to be added to your SSL certificate on Exchange.

    This is so users can use autodiscover externally to configure Outlook Anywhere and correctly find the correct Exchange Web Services and OAB URLs etc. 

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Proposed as answer by David Wang_ Tuesday, October 20, 2015 4:59 AM
    • Marked as answer by David Wang_ Friday, October 23, 2015 4:40 AM
    Thursday, October 1, 2015 10:20 PM
  • Hi,

    Yes, you can do it.

    On exchange 2013 you can add the new domain (domain2.org) in accepted domain and can create email address policy to apply the new domain name email address for new users.
    Also you can follow mark's response to create a DNS record for autodiscover.domain2.org .

    Regards,

    David 


    • Edited by David Wang_ Friday, October 2, 2015 6:33 AM
    • Proposed as answer by David Wang_ Tuesday, October 20, 2015 4:59 AM
    • Marked as answer by David Wang_ Friday, October 23, 2015 4:40 AM
    Friday, October 2, 2015 6:33 AM

All replies

  • Hello

    yes it works if on users not disabled email address policy.
    check certificate /DNS if use  exchange from outside/not domain member


    sorry my english

    Thursday, October 1, 2015 6:43 PM
  • Our agency needs to change our email address from domain1.org to domain2.org. Our AD domain is domain1.org. We want to be able to send and receive email as domain2.org.

    From reading this article https://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx it seems pretty easy to do this. My concern is that we need to be able to have users login using their domain1.org AD accounts but have their SMTP domain be domain2.org. Is this possible?


    Orange County District Attorney

    I would recommend that the UPN and SMTP and SIP address all match however since you are apparently changing the primary SMTP addresses.

    Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Thursday, October 1, 2015 6:59 PM
  • What we want to do have is to keep our existing AD infrastructure domain of domain1.org and then have users login to that domain as user@domain1.org. We'd like for them to send and receive email as domain2.org however. Is that possible?

    Orange County District Attorney

    Thursday, October 1, 2015 8:06 PM
  • Hi,

    To make the change, you need to change the below:

    1) Modify the email address policies so that you add the new domain as an email address on the mailboxes and set this as the default reply to address. This ensures that outgoing email comes from the new domain name. See here: https://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx

    2) Add an accepted domain on your Exchange servers for the new domain. This ensures that you can receive email for this domain. See here: https://technet.microsoft.com/en-us/library/bb124580(v=exchg.150).aspx

    To prevent user confusion and some support calls, and complete the domain change, it would be a good idea to change the UPN also. 

    There are no issues with this set up and many companies have different departments who have different email domains all on the same AD domain and in the same Exchange organization.

    Let me know if this answers your question. 

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Proposed as answer by David Wang_ Friday, October 2, 2015 6:28 AM
    Thursday, October 1, 2015 8:10 PM
  • What we want to do have is to keep our existing AD infrastructure domain of domain1.org and then have users login to that domain as user@domain1.org. We'd like for them to send and receive email as domain2.org however. Is that possible?

    Orange County District Attorney


    Hi Sandy, Yes. You can do that defintely. Just be aware that if you change the primary SMTP address, and users then think that is also their Logon Name, it wont work for them. Hence the recommendation to make the UPN and primary SMTP address match.

    Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Marked as answer by David Wang_ Friday, October 23, 2015 8:37 AM
    Thursday, October 1, 2015 8:13 PM
  • Hi,

    To make the change, you need to change the below:

    1) Modify the email address policies so that you add the new domain as an email address on the mailboxes and set this as the default reply to address. This ensures that outgoing email comes from the new domain name. See here: https://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx

    2) Add an accepted domain on your Exchange servers for the new domain. This ensures that you can receive email for this domain. See here: https://technet.microsoft.com/en-us/library/bb124580(v=exchg.150).aspx

    To prevent user confusion and some support calls, and complete the domain change, it would be a good idea to change the UPN also. 

    There are no issues with this set up and many companies have different departments who have different email domains all on the same AD domain and in the same Exchange organization.

    Let me know if this answers your question. 

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Hi,

    If all you need to do is ensure that ensure that users keep the same settings but now send and receive email using domain2,org, just follow steps 1 and 2 above. 

    Let me know if this answers your question. 

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Proposed as answer by Mark Gossa Tuesday, October 6, 2015 6:57 PM
    Thursday, October 1, 2015 8:39 PM
  • Thanks for the note Andy. We can change their UPN and have them login as that. That shouldn't be a problem. This would allow us not to have to create a brand new domain and move everyone over to it. We'll do that eventually but not now.

    I wonder how the Auto-Discovery would work on this? If a user in domain1.org, logs in with his domain2.org UPN and fires up Outlook the first time, will Outlook know to resolve to the correct mailbox?


    Orange County District Attorney

    Thursday, October 1, 2015 10:10 PM
  • Thanks for the note Andy. We can change their UPN and have them login as that. That shouldn't be a problem. This would allow us not to have to create a brand new domain and move everyone over to it. We'll do that eventually but not now.

    I wonder how the Auto-Discovery would work on this? If a user in domain1.org, logs in with his domain2.org UPN and fires up Outlook the first time, will Outlook know to resolve to the correct mailbox?


    Orange County District Attorney

    Well, autodiscovery used to fail not so long ago if the UPN and primary SMTP address didnt match, but Outlook should work now if they are different as long as Outlook is updated to the latest hotfixes and such.


    Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Thursday, October 1, 2015 10:18 PM
  • Don't forget to create a new autodiscover.domain2.org externally and have this resolve to your Exchange server. The new name autodiscover.domain2.org also needs to be added to your SSL certificate on Exchange.

    This is so users can use autodiscover externally to configure Outlook Anywhere and correctly find the correct Exchange Web Services and OAB URLs etc. 

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    • Proposed as answer by David Wang_ Tuesday, October 20, 2015 4:59 AM
    • Marked as answer by David Wang_ Friday, October 23, 2015 4:40 AM
    Thursday, October 1, 2015 10:20 PM
  • You'll also need to configure your SPF record for the new domain externally. More information here: http://markgossa.blogspot.com/2015/08/understanding-spf-records-part-1.html

    Thanks.


    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010

    Blog: http://markgossa.blogspot.com

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Thursday, October 1, 2015 10:22 PM
  • Hi,

    Yes, you can do it.

    On exchange 2013 you can add the new domain (domain2.org) in accepted domain and can create email address policy to apply the new domain name email address for new users.
    Also you can follow mark's response to create a DNS record for autodiscover.domain2.org .

    Regards,

    David 


    • Edited by David Wang_ Friday, October 2, 2015 6:33 AM
    • Proposed as answer by David Wang_ Tuesday, October 20, 2015 4:59 AM
    • Marked as answer by David Wang_ Friday, October 23, 2015 4:40 AM
    Friday, October 2, 2015 6:33 AM