Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium


Merge international Subsidiaries Exchange mailboxes

Posted on 2011-04-28
Medium Priority
Last Modified: 2012-05-11

We have some Subsidiaries in 4 countries worldwide and they have all their own Mailservers and internal and external domains right now.

In fact of a Company renaming we discuss now the pros and cons to host all these mailboxes of the Subsidiaries also on our Exchange 2007 server in our headquater.

Actually we have just 160 Mailboxes here in our headquater, after we would have 300. Now I would like to clarify the possibilities, because all Subsidiaries have their own internal domain controller and domain names and we don't have any VPN solution between all our Subsidiaries and us.

Should we all have to be in the same Active Directory that this scenario will work at all?
What are the restrictions if we are not in the same Active Directory domain? Address lists, etc.? Would need have in a large subsidiary with 30 mailboxes their own separate Exchange server in their own network which is replicating the data with our Exchange in the headquater?

We have 160 mailboxes, the largest subsidiary company has 30 mailboxes and all the others between 10 to 20. So can we really save money with such a complex configuration? Because they all have allready their own system.

What's about the installed Outlook languages in all this countries, because one subsidiary is located in China. Could that make troubles with an english Exchange?

So many questions ;-)
I am grateful for all hints.

Question by:Wayne7215
1 Comment
LVL 37

Accepted Solution

Jamie McKillop earned 2000 total points
ID: 35493825

If you don't have private network links between your offices, you are limited in your options. You don't need all the offices in the same AD forest but you will need to setup trust relationships if you want users to use their current AD credentials to access their mailboxes. This would require private links.

What you could do is create new AD accounts in your main office AD for each subsidiary user. The users would then use those credentials to log on to the mailbox. The disadvantage here is that users would have two accounts to manage.


Featured Post

Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to effectively resolve the number one email related issue received by helpdesks.
Last month Marc Laliberte, WatchGuard’s Senior Threat Analyst, contributed reviewed the three major email authentication anti-phishing technology standards: SPF, DKIM, and DMARC. Learn more in part 2 of the series originally posted in Cyber Defense …
In this video we show how to create a mailbox database in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Servers >> Data…
To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Rules tab.:  To cr…
Suggested Courses

571 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question