Exchange 2010 w/ Multiple Domains under SBS 2011 - To/From per Mailbox, per User
I'm configuring Exchange 2010 on SBS 2011 and need to give each user in my company the ability to receive and send from multiple authoritative domains. (So far I have been able to successfully configure the "TO" a single mailbox for each user) I've found someone that seems to know the "best" solution to do this without creating a new user for each mailbox, but it's a bit cryptic: forums.msexchange.org link Yes it's possible. Each mailbox requires a unique AD object though. After creating the other objects/mailboxes, give full permissions to the actual logon accounts used. Then set up the Outlook profile to add the other mailboxes or set up separate Outlook profiles (one for each mailbox). Could someone point to a walkthrough or elaborate a bit further on what the author means before I destroy my AD? Furthermore, does Exchange 2010 still have a 1-to-1 relationship with Mailboxes? Furthermore, I've not only do I need to give the ability to send from the domains for each user, I need to give them the ability to respond for the original address he or she was written to. I have found others mentioning that this is not possible natively under Exchange: social.technet.microsoft.com link It cannot be done natively. You should use 3-rd party software. Is this statement correct? What is the third party software? (Problematic for SBS due to licensing) Beyond the walkthrough, is there a way for Exchange to automatically create the mailbox and give permission for each new user?
May 29th, 2011 10:41pm

Simon, thanks for the response. Due to regulatory reasons, I have to create 3 separate Exchange databases to host the mailboxes for the 3 separate companies. Some employees work for 2 companies, others for all 3. Hence, the inboxes should receive and store all mail separately. On a side note, we are running Outlook 2007, but upgrading to Outlook 2010 is a possibility. If Exchange has a direct 1:1 relationship between mailboxes and user accounts, what is the best practice for adding additional mailboxes for staff under my circumstances? Should I create 2 additional "Mail Users" w/ mailboxes for each person? (Option #2 in the article you wrote seems to be in-line with this)
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May 31st, 2011 4:22pm

I was hoping to be able to have the SBS 2011 interface configure everything w/o having to dive into Exchange for every new user entering/leaving our organization, but we're small so for now it isn't much of an issue. I suppose it is also a personal preference not to have SBS show 3 versions of a user for cleanliness. (Thus the question about creating a Mail User / Mail Contact instead) As for the mailboxes, we are placing the Exchange databases on separate hard drives since our companies have different requirements for data retention, backup, and disaster policies.
May 31st, 2011 10:53pm

What you are doing is a more advanced configuration. You can't avoid the Exchange 2010 management console for this kind of use. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
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June 1st, 2011 8:32am

This should be my last question. Do you have a preferred method for keeping delgates "send from" email in the actual mailbox that they are sending from?
June 1st, 2011 5:24pm

http://blog.sembee.co.uk/post/Sent-Items-Storage-for-Shared-Mailboxes.aspx Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
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June 2nd, 2011 8:58am

As far as I am aware, nothing has changed. SBS 2008 and higher uses honour based licencing - therefore there is nothing to stop you from creating more mailboxes. Mailbox = user. You just need to ensure that you have the licences to satisfy an audit. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
February 3rd, 2012 7:59am

As far as I am aware, nothing has changed. SBS 2008 and higher uses honour based licencing - therefore there is nothing to stop you from creating more mailboxes. Mailbox = user. You just need to ensure that you have the licences to satisfy an audit. Simon. Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me. Hi Sembee. We are trying to create a system with 40 real users and 100 mailboxes. What will SBS do when say 90 of those mailboxes are being accessed regularly? Will SBS stop accepting new connections to retrieve mail because the 75 user limit has been exceeded?
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June 4th, 2012 12:54pm

As far as I am aware, nothing has changed. SBS 2008 and higher uses honour based licencing - therefore there is nothing to stop you from creating more mailboxes. Mailbox = user. You just need to ensure that you have the licences to satisfy an audit. Simon. Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me. Hi Sembee. We are trying to create a system with 40 real users and 100 mailboxes. What will SBS do when say 90 of those mailboxes are being accessed regularly? Will SBS stop accepting new connections to retrieve mail because the 75 user limit has been exceeded? As I have already written - there is nothing in SBS 2008 and higher to physically stop you. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
June 4th, 2012 6:24pm

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