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Feasibility of hosting multiple domains for several clients RRS feed

  • Question

  • We are looking to offer Exchange 2016 as a managed service for a number of our clients.  At the moment they are using POP3/SMTP environment.  There are a number of Internet companies that offer Office365 / Hosted Exchange, at discounted pricing.

    However our clients have very little in-house IT expertise, so we will be managing the whole solution.  We have two options, install Exchange on site at each client location or run a hosted solution of Exchange in the cloud.

    Some clients will require 10 mailboxes, whilst others just 1 or 2.  Can anyone offer any general advice on what would be the better solution.  

    I am moving more towards a cloud solution.  If we were to go this route, would be install Exchange 2016 and Active Directory under a domain name that we run, and add the client domains as secondary accepted domains?

    Also, what would happen if you had two users with the same name or two mailboxes called Sales...

    Wednesday, October 31, 2018 6:20 PM

All replies

  • Hi,

    Two options for you:

    1. Use Exchange Online, verify all your customers' domains and manage your Office 365 customers in Office 365 Partner admin center.

    2. Assuming that your customer's domains are not managed by Active Directory (AD), as you said, you should add their domains as accepted domains, create public A records for these domains (autodiscover.domain.com and mail.domain.com), create MX records for these domains and point them to your own domain. Since they are using POP3 to receive emails, there is no need to configure Autodiscover redirection.

    For your last question: The alias or display name for all users should be different from each other, or it may cause conflicts in AD.

    Hope it helps.

    Regards,

    Manu Meng


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    Thursday, November 1, 2018 9:26 AM
    Moderator
  • Just a couple of follow up questions.  If we were to move the users away from POP3, what changes do we need to make for Autodiscover.

    Also, say we have two users John.Smith@abc.com and John.Smith@cba.com.  How would we prevent conflicts in AD ?

    Thursday, November 1, 2018 9:40 AM
  • Just a couple of follow up questions.  If we were to move the users away from POP3, what changes do we need to make for Autodiscover.

    Also, say we have two users John.Smith@abc.com and John.Smith@cba.com.  How would we prevent conflicts in AD ?

    You should implement SRV records for Autodiscover or use Autodiscover redirection method.

    A good blog for your reference: Exchange 2010 Multi-Tenant AutoDiscover Service.

    Both are valid SMTP addresses, but you should avoid that there are two AD users with same name.

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Thursday, November 1, 2018 10:14 AM
    Moderator
  • Regarding those two addresses, that is the problem I might run into.  If we are hosting email for different domains it is likely that we might have same username or sometimes email like info@abc.com and info@cba.com.

    Apart from deploying a separate Exchange 2016 server, is there anyway around this?  You mention that I should avoid that there are not two AD users with the same name.  Do you have any recommendation on how to do this ?


    • Edited by NeilDT Wednesday, November 7, 2018 12:04 PM
    Thursday, November 1, 2018 10:23 AM
  • Regarding those two addresses, that is the problem I might run into.  If we are hosting email for different domains it is likely that we might have same username or sometimes email like info@abc.com and info@cba.com.

    Apart from deploying a separate Exchange 2016 server, is there anyway around this?  You mention that I should avoid that there are not two AD users with the same name.  Do you have any recommendation on how to do this ?


    If there is only one AD structure, I think we couldn't avoid that, unless your Exchange is deployed in the resource forest topology, under such circumstance, customers will manage their own accounts in their respective AD structures.

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Thursday, November 8, 2018 8:49 AM
    Moderator