Hosting email from multiple organisations using Microsoft Exchange server ??

Posted on 2006-05-25
Last Modified: 2010-03-06
Hi ,

I am looking to HOST exchange services for my customers to cut there cost implementing MS Exchange server, as you know Exchange is not cheap but the CALS are...

Does anyone know of a good way to do this?

I know how to host multiple SMTP domains, but cannot get my head round hoe to configure the clients etc..  

For example 2 companys ABC.COM / 123.COM ... I can configure exchange to accept mails from these domains, no problems.  I want to configure MS Outlook to retrieve their messages only.  If i configure a signle AD domain i.e. MAILHOSTING.COM and then create the users with specific UPN's for their logins... How can i restrict the GAL not to show the other company's Accounts? and restrict them to only their own GAL?

Is this the right way to configure the server ?  

Thanks in advance!!
Question by:jay_jones
    LVL 7

    Expert Comment

    Its Not a  big deal. You can create one recepient policy for every company you host. Create the same number of GAL. ( use the same filter as you used in the recepient policy). Once the GAL is created, then assign  read permission to a security group( company users) and for the rest deny. Of course you will create a security group for each company.

    There are many article which will help you do this.;[LN];280435;en-us;319213


    Author Comment

    How would i configure the clients?  Outlook via HTTPS? These users will not be part of the same "windows" domain,,,,
    LVL 7

    Accepted Solution

    The outlook clients have option to use rpc over http ( outlook 2003 ) for MAPI access. This is same as using the exchange in the LAN.

    Other options to access mail  from Exchange is :
    POP or IMAP or HTTP.

    I have added some articles here for your reference. With all these articles and previous links you should be good to go... of course you will have some small setting questions which would be answered by any one here.....


    LVL 104

    Assisted Solution

    The subject comes up very frequently. We have covered hosting Exchange a number of times.
    However, you should speak to Microsoft about this solution as I believe that it not allowed in the licensing terms. If you want to host Exchange for other companies then you have to license the software via their hosting plan. This will give you other benefits such as access to their resources for service providers which us normal Exchange users don't get.

    LVL 7

    Expert Comment

    Yes I have objection. My answer is termed as "GOOD ASSIST"  and I got the point for good assist.

    When I see in the site I see that my answer is "Accepted Answer". And I think it reflect the correct status.

    I should get point for Accepted Answer.

    If Sembee has the Accepted Answer points then its wrong. Because  towards licensing rather than technical. It is correct but the point should be mine  :)

    LVL 20

    Expert Comment

    When there is a split ALL experts get "Good assist" mails - even the accepted answer. This is how the system works...
    LVL 7

    Expert Comment

    I did not know that . Thanks for the information.



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