How Can I Add Mutiple Domains for a Exchange Server 2019 and create users with them in a exchange server

Question

How Can I Add Mutiple Domains for a Exchange Server 2019 and create users with them in a exchange server

Kanav Sharma 25

Hi Team,

I have set up the exchange server 2019 on the virtual machine that is integrated with the active directory and attached the domain suppose abc.com. I have created some users with this domain such as ******@abc.com and ******@abc.com in the active directory. These users are successfully getting authenticated in the exchange server. Now I want to set up multiple domains for the same exchange server. I also configured domains eg xyz.com or efg.com but the issue is when I create users with these domains like ******@xyz.com or ******@efg.com, they are getting authenticated in the exchange server. I want to know about the solution like how I configured multiple domains for a single exchange server in 2019 and how can I authenticate with all the domains in a single exchange server. Should I have to create or separate servers or active directories for the single exchange server or I can use the single server(Virtual Machine) with multiple domains in the exchange server? please provide me with a brief solution and try to help me out with this solution as soon as possible. Please reply in the comments as soon as possible.

Contact - <email address removed>

Accepted answer

2 additional answers

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Answer 1

Hi Kanav Sharma,

Kindly note that here on Microsoft Q&A forum we mainly support via community post, and we cannot contact you by email.

For security reason, I have removed your email address in the post.

If you would like phone support, please contact Global Customer service Phone number

Thanks for your understanding.

Should I have to create or separate servers or active directories for the single exchange server or I can use the single server(Virtual Machine) with multiple domains in the exchange server?

If your requirement is to have users sending emails with different domain suffix, you can use a single Exchange server and add these domains as accepted domains in Exchange Admin Center, then create and apply email address polices to these users.

Below is an example with the general steps.

Scenario:

The Active Directory domain is domain1.com, by default mailboxes created in Exchange have domain1.com as domain suffix
I want to add xyz.com as an additional email domain and have some mailboxes have xyz.com as domain suffix

1.In Exchange Admin Center, create an accepted domain named xyz.com

2.create an email address policy

select xyz.com as accepted domain

click save and back to the former page, in below settings click "add a rule" to custom which users the policy would be applied to (in this example the rule is applied to the users in the "xyz.com" organization unit in Active Directory)

in xyz.com OU:

3.Once the policy is created, click "apply" to apply the policy to the users (in this case apply to user03)

You can see user03's email address changed from ******@domain1.com to ******@xyz.com.

Before:

After:

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Answer 2

Kanav Sharma 25

Hi KaelThank you for your support. It is working fine. But still, there is an issue that I can't login with the user (appended with new domain user03xyz.com ) in the Exchange Outlook mailbox. The scenario which is going on right now is that I am able to login only with the user with the root domain(******@domain1.com) but after login when I am sending a new mail, the user through which I send an email is the new user with the new domain(user03xyz.com). So basically I can only login with the root domain user and when I send the emails it is the new user with the new domain. Please help me out so that I can also login with a user (with the new domain) through which I am sending emails. Please find the attached pictures for reference.

For reference:

Your root domain = my root domain [ (@domain1.com=@cloudops-ticket.tk) ]

Your new domain = my new domain [ (user03xyz.com = ******@xyz.tk) ]

******@xyz1.png.png (This is the new domain user)

loginuser.png This is the root user .

******@xyz.png.png this is the new user with new domain which i get after login in with the root domain.

Kael Yao 37,746 Reputation points Moderator

2023-06-14T05:15:46.22+00:00

Thanks for the update.

Please follow the steps in this link to add UPN suffixes (xyz.tk) to your domain and change the UPN suffix for these users in Active Directory.

Example:
Kanav Sharma 25 Reputation points

2023-06-14T05:34:47.9466667+00:00

Thanks for quick support. Let me try and implement this. Will it solve my login issue with the user with new domain? That by applying this method can I login and send mails with the user with new domain??
Kael Yao 37,746 Reputation points Moderator

2023-06-14T05:40:17.8+00:00

Yes, you should be able to login and send emails with the new domain.
Kanav Sharma 25 Reputation points

2023-06-14T09:12:32.4266667+00:00
Hey Kael,

Thanks for your support. I was able to login with the user with new domain . But I have a little confusion that even I am able to login and send email with the user with new domain but when I send mail with that user , the domain which is appended after my is the old domain. For reference I am attaching the pictures which will make this more clear. I want that the user with new domain, with which I login and send mai, should have new domain appended in its mail id.

I created a new suffix with domain - chandigarh.ml

Have have created a new organizational unit under my domain --

Screenshot 2023-06-14 131645.png

I made a new user by selecting that suffix domain -

Screenshot 2023-06-14 132305.png

But after saving that user I get this as its email id - ******@cloudops-ticket.tk
but I want normally chandigarh.ml as a domain in my user

Screenshot 2023-06-14 132518.png
5. SO after above , in mail flow , under acceted domains i addded a new domain - chandigarh.ml , there also

Screenshot 2023-06-14 132852.png

Now when I create a new user in exchanger server , don't get that user in existing users although it is already in my ad -

Screenshot 2023-06-14 133832.png

Then I create a new user and while creating , under organisational unit i select chandigarh.ml

Screenshot 2023-06-14 135720.png

But after selecting that i get the domain in this way - **cloudops-ticket.tk/chandigarh.ml , with logon name - ****@chandigarh.ml

Screenshot 2023-06-14 140533.png

Now the user which is created still contains this domain - cloudops-ticket.tk in its name .

Screenshot 2023-06-14 141103.png

I want that name of domain which i selected - chandigarh.ml
in its place.

Now i login with that user with logon name - ******@chandigarh.ml , by using it i can login to this user , (mentioned in a pic in step 8)

Screenshot 2023-06-14 143856.png
but after logging in i still get the domain with user as - cloudops-ticket.tk

Screenshot 2023-06-14 143956.png

Now when i send an email to any user , the domain in my user (the one which is sending mail) is still same - cloudops-ticket.tk
For reference i am attaching two pics which clearly show that the new domain chandigarh.ml is not there but old root domain cloudops-ticket.tk is there-

Screenshot 2023-06-14 142547.png

Screenshot 2023-06-14 142529.png

SO basically i can login with that new user with new domain but after logging in , the domain is still the old one root domain - cloudops-ticket.tk , but i want that the domain and user with which i logged in i.e ******@chandigarh.ml should be working there , not the old root domain .

please help me out how can i do that. My main task is that only, that the user with new domain with which i logged in should be used in sending and receiving mails and when the mail is sent , the user should be of that domain - ******@chandigarh.ml
Kael Yao 37,746 Reputation points Moderator

2023-06-14T09:30:43.9566667+00:00

Thanks for the update.

Have you applied the email address policy? (please refer to step 3 in my former reply)
Kanav Sharma 25 Reputation points

2023-06-14T21:38:48.55+00:00

Thank you for your support. You are great!! -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------! Thanks
Kael Yao 37,746 Reputation points Moderator

2023-06-14T23:54:35.28+00:00

Glad to help!

While please kindly note that Microsoft Q&A forum recommends only posting one question per thread , unless the questions are related.

In this case I would suggest creating a new thread for this new question.

(And since to me this may need Powershell or EWS for scripting, please add the "Exchange server development" or "Powershell" tag to the new question)

If the original question has been answered, please accept my reply as the answer to it.

It may also help other community members.

Thanks for your understanding.

Answer 3

Hi kael kindly help the below scenario the active directory domain is name is Example domain.com as domain suffix and we have xxx.com as an additional email domain

1- exchange 2019 DAG mailbox server roles EX0-1 172.16.1.10 EX0-2 172.16.1.10
https access NAT (spacename email.domain.com/owa ) facing protocol TCP 443 on public IP 95.33.xx.5)
2- DMZ inside 192.168.4.20 mail gateway IMSVA delivered method (routing)
and facing protocol TCP 25 on public IP 95.33.xx.4 (ISP PTR record with name mail1) mail1.domain.com.
the problem is that we cant able to access OWA form outside also Incoming /outgoing emails NOT working. kindly help how do I configure DNS records A,C,MX and should to be pointed on public DNS and local DNS zone.
your support is highly appreciated

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How Can I Add Mutiple Domains for a Exchange Server 2019 and create users with them in a exchange server

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