Moving FROM Office 365 to Exchange 2010

Posted on 2012-09-11
Last Modified: 2012-09-11
This company, which has Exchange 2010, has bought another company whose users are on Office 365. My task is to bring cloud mailboxes to on-premise Exchange server. Obviously the two SMTP domains are different at this time.

Is there any information (articles, blog posting etc) available on the topic? I know there is a whole lot for going the other way.

If any of you have gone thru such a process, or are aware of the steps involved, please provide an overview.

I will raise the points commensurate with helpful information provided. Thanks.
Question by:Akulsh
    LVL 20

    Expert Comment

    by:Svet Paperov
    I would start with a good manual about Exchange 2010. For example, the MCTS Self-Paced Training Kit contains all you need to set a multi domain Exchange server.
    LVL 3

    Author Comment

    I don't need training in Exchange 2010. I have been administrating multiple Exchange servers for a while, and know quite a bit. I need to know steps involved in migration of mailboxes from Office 365.
    LVL 10

    Accepted Solution

    hey aklush,

    Ive actually had to do this before for a bigger customer who didnt care for office 365, we ended up using to do the migration of email.  It was a great tool to do a migration like this, if you dont use a 3rd party tool like this youll end up making pst's of the mailboxes from outlook then reimporting them into the exchange 2010 server which is a very painful way of doing this.
    LVL 3

    Author Comment

    Hello justinoleary911,

    I was hoping to hear from someone like you who has worked in trenches. A few questions:

    - How long ago, did you do this migration?
    - Was Exchange 2010 at SP1 or SP2?
    - Was Microsoft Tech Support of Office 365 not helpful at all?
    - Were the users of Exchange 2010 server and Office 365 belong to the same forest/domain? If not, did you use ADMT along with's tools?
    - Did the on-premise Exchange server mailboxes and Office 365 mailboxes belong to the same email domain?

    I am asking the last 2 questions because in our case, we are migrating from one forest to another, and obviously have two SMTP domains.

    LVL 10

    Expert Comment

    1. i did the migration about 2 months ago.  it was exchange 2010 with sp2.  

    2. MS tech support is not really helpful with moving away from there cloud services there trying to push hard right now.

    3. the users were not part of any domain they just used hosted email with BPOS then they were transitioned to 365.  So they were moved to a new internal domain with premise based exchange 2010.  The only tools youll ever need is the tools they offer.
    LVL 3

    Author Comment

    Thank you very much. (Our scenario is little more complicated since we are moving between two forests.) I have doubled the points.

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