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6 crosss domain Exchange with hybrid exchange 2k3,2k7,2k10.

we  are having the envoronment 6 crosss domain Exchange with hybrid exchange 2k3,2k7,2k10.
we have a request like user in Domain A wants to move mailbox  to Domain B.
Domain A- exch2k7,2k10 cross domain || Domain B- Ex2k3
I have checked 2Way trust is there btwn the  domains . Then i have tested like disable the test mailbox in Domain A , while  reconnect the mailbox i  have tried to browse the object in Domain B to map the mailbox . But it is not browsing Domain A.
Then i tried vice versa Domain B user object trying to create mailbox and browse the Domain A's mailbox server , in the drop down box it is not showing  all other Domain Mailbox Databases .

Can we migrate the Ex2010 mailbox to Ex2k3?
Since Mailbox size 16GB its not easy/good to migrate.?
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Buntyquest
Asked:
Buntyquest
1 Solution
 
SreRajCommented:
Yes we can move a mailbox from Exchange 2010 server to Exchange 2003 server. You could use New-MoveRequest cmdlet from an Exchange 2010 server to initiate a move request. Mailbox will be offline during the move and user will be losing dumpster data. Please refer following link for more information.

http://technet.microsoft.com/en-us/library/dd638157(v=exchg.141).aspx

Since you are moving mailboxes thru different domains, you will have to consider using a tool like Active Directory Migration Tool. The following article gives different options for mailbox move within different domains.

http://blogs.technet.com/b/exchange/archive/2010/08/10/3410619.aspx

Mailbox of size 16 GB can be moved, speed of mailbox move will depend on the network bandwidth available. You mave have to check the size limitations of mailbox in the destination database and verify whether it can accomodate 16 GB mailbox. Mailbox move could also fail if it encounters lot of corrupted items during the move. You can set a higher value for number of corrupted items using the parameter 'BadItemLimit' for New-MoveRequest command.

http://www.msexchange.org/articles-tutorials/exchange-server-2010/management-administration/moving-mailboxes-exchange-2010-part2.html
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