Office 365 Domain Aliasing

I have a customer set up with O365 Small Business Premium and Exchange 2013.  Their primary domain for email is  They have another domain .. and would  like email sent to the users in this 2nd domain to be forwarded to the corresponding users in the primary domain.   They would also like the option  to send email from the secondary domain email addresses.   Is this possible with O365 SB premium?   Or does the secondary domain need it's own email server?
I was told it is possible to set up a domain alias but that doesn't seem to be the case with O365 SB.
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Jeffrey Kane - TechSoEasyConnect With a Mentor Principal ConsultantCommented:
You can set up as many additional domains as you like.  

On the Manage your organization page, just click "Domains" -- then it gets a bit confusing because of the way Microsoft has changed the language of the next page.

You want to click "START NOW" under the "Would you like to change your Office 365 email address now", even though you aren't going to be changing the default domain, you will be adding an additional one.

Once you go though that and verify your domain ownership, verify the DNS Settings, it will be available in the Add Aliases settings for each user.

When sending mail from Outlook Web App, there will be a drop down list for the "From" address.  If using Outlook 2013, you need to enable the "From" field to be viewed in order to see the drop-down in the Compose New Message window.
bbornerAuthor Commented:
Thank you Jeffrey for your prompt and very clear response.
bbornerAuthor Commented:
Do i need to add a full Small Business license for each alias at the secondary domain?
Doesn't let me past add users which requires a license for each.
It is requiring that i change name servers to theirs.  No ability to do manual assignment of DNS settings.   So to get to where you can change name servers you have to first add users.
Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
No, licenses are based on PEOPLE.  If you need to add an additional receiving email address, you do not need to add a USER, you can do that by adding either a Shared Mailbox or Group -- these do not require licenses.  You only need at least one user to configure everything else -- and that's the user account you are using to log in with.

As for Manual DNS, that's no problem either.  After you click the "START NOW" button, you enter the domain name you already have registered elsewhere and then click NEXT.

On the following screen you will see this:

Domain Setup
Then on the following screen you are provided with the four steps you must take in order to have the domain work with Office 365.  The first step is to confirm that you own the domain -- you cannot proceed until you do that.  Click on the link for instructions on how to confirm.

If you have further questions -- it would be best to post an additional question, as I don't follow up on closed questions very quickly.
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