Exchange 2010 mailbox migration to separate domain

TNGL · 22 Aug 2011 at 01:09

Exchange 2010 mailbox migration to separate domain/forest

Hi,
How would I go about moving mailboxes from Exchange 2010 Server A to Exchange 2010 Server B? Exchange 2010 Server B will be in a separate forest and domain to Server A.

All of the users from the forest of Server A will be imported in to Server B's Active Directory using ADMT.

Would I just do a remote move request to Server B? (Probably not as that sounds too simple.)

There will be a trust relationship between these domains/forests whilst the users/mailboxes are migrated. After that server A's domain/forest will be taken offline and the trust removed.
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Any help please?

Sin_Chase · 22 Aug 2011 at 01:29

How much data?

TNGL · 22 Aug 2011 at 01:30

50 mailboxes max. Probably around 10gb of data in total.

MasterPlan1 · 22 Aug 2011 at 09:06

I'm not sure how relevant this is as it's for 2k3, but it mentions the same thing - it's all driven by PS, so should be fine.

http://msgsense.com/2011/01/18/gui-...3-to-exchange-2010-cross-forest-move-mailbox/
http://www.myexchangeworld.com/category/migration/
http://msgsense.com/2011/01/18/cross-forest-move-mailbox-request-from-exchange-2003-to-2010/

IIRC one of those domains was coming up as malicious last time I forwarded these articles on to someone, but there are a tonne of articles which are doing the same on the internets.

TNGL · 22 Aug 2011 at 10:52

MasterPlan1 said:
I'm not sure how relevant this is as it's for 2k3, but it mentions the same thing - it's all driven by PS, so should be fine.

http://msgsense.com/2011/01/18/gui-...3-to-exchange-2010-cross-forest-move-mailbox/
http://www.myexchangeworld.com/category/migration/
http://msgsense.com/2011/01/18/cross-forest-move-mailbox-request-from-exchange-2003-to-2010/

IIRC one of those domains was coming up as malicious last time I forwarded these articles on to someone, but there are a tonne of articles which are doing the same on the internets.

Thanks a lot for those links, the one from myexchangeworld is very helpful. The others don't work.

Sin_Chase · 26 Aug 2011 at 01:30

10GB of data?

For that little I would consider extracting it at the client and not bothering to faff around with the backend.

Skidilliplop · 27 Aug 2011 at 16:52

Yeah I'm inclined to agree with Sin_Chase, 10GB isn't much. I'd use something like ExMerge.exe to suck the data out and push it back into the new IS.

Not sure if it'll create mailboxes that arn't there...so might need to do a little powershell script to create the mailboxes before you fill them up.

MarkA · 29 Aug 2011 at 17:13

Exmerge doesn't work on Exchange 2010 as far as I'm aware.

These are the scripts I used to do exactly what you are doing, except I was using 2003 as the source for mailboxes.

./Prepare-MoveRequest.Ps1 -Identity "CN=username,OU=YourOU,OU=StaffOU,OU=AnotherOU,DC=internal,DC=local" -RemoteForestDomainController oldexchangeserver.internal.local -RemoteForestCredential $Remote -LocalForestDomainController newexchangeserver.domain.local -LocalForestCredential $Local -TargetMailUserOU "OU=Migration OU,OU=Users,OU=Company,DC=domain,DC=local" -UseLocalObject

New-MoveRequest -Identity "CN=username,OU=Migration OU,OU=Users,OU=Company,DC=domain,DC=local" -RemoteLegacy -TargetDatabase "NEW Database" -RemoteGlobalCatalog "oldexchangeserver.internal.local" -RemoteCredential $Remote -TargetDeliveryDomain "maildomain.com"

Also, you will need to use
$local = get-credential
$remote = get-credential

to cache your credentials for the powershell commands.

MS provide you with the prepare-moverequest.ps1, whick will copy your accounts instead of using ADMT, dont need to use ADMT unless your copying SID history.

Cheers.