Exchange 2007 migration to Office 365

Hi,

My company wants to migrate there exchange 2007 server to office 365. I have a few questions which I would appreciate answers to:

1. Can I have multiple mails domains configured within Exchange office 365
2. Do I have access to all the same functions and features using exchange 365 as I do from an onsite Exchange Server? (i.e shared calendars, meeting requests, out of office etc)
3. How much access do I get to the actual Exchange backend for config?
4. I have huge user mailboxes and I am worried about doing a cutover and crippling my exchange server? can I copy users mail into pst files and upload there mail a few users at a time over a period through import/Export in Outlook?
5. Other than the per user mailbox charge is there any other setup charges?

Many thanks for any help you can offer.

Regards
Tim
wifiitAsked:
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Vasil Michev (MVP)Commented:
1) Yes
2) User experience is almost unchanged. As admin, you will obviously have a more limited options. All of the functionalities you mentioned are available
3) Only your tenant obviously, and some commands are missing. For example, throttling settings. Usually not a dealbreaker, as most of the important features are available.
4) You can configure both the local and cloud profiles in Outlook and use pst or drag/drop to move the mail. Better solution is to use PST Capture (http://technet.microsoft.com/en-us/library/hh781036(v=exchg.141).aspx). But any pst related scenario will greatly impact you as admin in case you have anything more than dozen users.
5) Depends on what you gonna use :) Shared mailboxes are free, up to a certain limit. Resource ones are free. DL/contacts/etc are also free. Advanced features, such as litigation hold, require the more expensive Exchange Plan 2
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