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Exchange 2010 migration to Office 365 E3, want to reserve the AD integration option for future use

Posted on 2014-09-17
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Last Modified: 2015-01-18
Hi

Which solution do you recommend for moving 28 pcs of Exchange 2010 maiboxes to Office 365 E3? We plan to implement AD integration later on. The mails are now at Win 2008 R2 std / Exchange 2010 Server. No idea if there are any SPs installed on it.

When the migration is complete the old Exchange server will be decommissioned.

If all fancy mathods fails I checked allready that I can relatively easy export mails to pst directly at the server. Is it against good practices to configure Outlook 2013 for all email boxes and simply use Outlook's import function  to have mails onto Office 365. I wouln't use end users Outlook for this rather have some laptops in different location to do the job.

Thanks in advantage,

JR
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Question by:RimFire007
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6 Comments
 
LVL 76

Accepted Solution

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Alan Hardisty earned 500 total points
ID: 40327896
The only relatively easy migration option you have is a Cutover migration and you will need a 3rd party SSL certificate installed on your Exchange server to complete this is 365 uses RPC over HTTPS to suck the data from your server directly.

The alternative is to export to .PST file and import / push your mail up, but that depends on the speed of your upload link and the amount of data that has to be pushed as to how long that will take.  It will also mean new emails don't appear until the whole mailbox is pushed, or Outlook is closed and re-opened.

Alan
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Assisted Solution

by:RimFire007
RimFire007 earned 0 total points
ID: 40328031
Thanks Alan

The customer is new to me. I can see at least one public SSL certificate at the server allready. Should it apply for Cutover?

The reason why the customer moves to Office 365 is total BlueScreen problem with the old server. The former administrator were forced to recover it using some serious money. Now I'm afraid to use any sophisticated methods (Cutover counts sophisticated to me) with this server. I will defently check the Cutover but Outlook 365 and import from pst may be my selection.

I think it is a good idea to leave on Computers and Office 365 configured Outlooks at customer site during weekend (migration will start at Friday). In that way they start fetching mails from Office 365 as soon as they appear there. I simultaniously upload mails to Office 365 from my company’s site (we have 100/100 fiber here) using Office 365 Outlook import function. Do you think this is a way to go?
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LVL 76

Expert Comment

by:Alan Hardisty
ID: 40328110
Public SSL cert is fine.  You can do the cutover migration if the Exchange server is happy and Outlook Anywhere is working, but failing that, the PST method is fine, especially as they can Pull their emails down and you can Push them up :)

Is there a lot of data to push to O365?

Do you have an O365 partner to help you out or are you an MS Partner?

Alan
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Author Comment

by:RimFire007
ID: 40328183
Hi Alan

28 mailboxes and the size should be apx. 1-2GB each. I Tested allready with 700MB mailbox and
by calculating based on that it will take 7 hours to export them all to pst from exchange and other 7 hours to download them from current Datcenter to our site.

We are MS Partner and this (or what ever project we sell) is what we do for living. I usually always ask some advice before I start projects like this.

Rgs, JR

Juha
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LVL 76

Expert Comment

by:Alan Hardisty
ID: 40328939
Excellent - if you weren't partnered up I was going to suggest you do with someone local, but sounds like you are already in good hands (your own!).

Sounds like it should all be completed over the course of a weekend depending on how many machines you have pushing at the same time.

Bear in mind that the 700mb was not having to fight other mailboxes, so allow a bit longer if you have several pushing / pulling at the same time.
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Author Closing Comment

by:RimFire007
ID: 40556017
Thanks, we just uploaded the psts to O365 and it wen fine.
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