Many procedures have changed since Exchange 2003 days where we would use a tool called Exmerge. Nowadays we only use the power of Power Shell. Let’s take a look at the process involved to achieve this task.

If migrating mailboxes from Exchange 2003 from one organisation to a new Exchange 2010 organisation you need to first perform a export on exchange 2003 using Exmerge.

1. Export PST from old system.

Article ID: 292509
How to configure an account to use the ExMerge utility in Exchange 2000 Server and in Exchange Server 2003


2. Exchange 2010 install Outlook 2010 X64bit (ideally I would initiate an install from the x64bit folder itself)


3. Create RBAC Exchange 2010 Groups
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Understanding Role Based Access Control
http://technet.microsoft.com/en-us/library/dd298183.aspx


Get-ManagementRoleAssignment -role "Mailbox Import Export" | ft Identity

Get-ManagementRoleAssignment -role "Support Diagnostics" | ft Identity


New-RoleGroup -Name "Exchange Mailbox Import Export" -Roles "Mailbox Import Export" -DisplayName "Exchange Mailbox Import Export" -Description "This group will provide access to mailbox import and export cmdlets within entire Exchange Organization."


New-RoleGroup -Name "Exchange Support Diagnostics" -Roles "Support Diagnostics" -DisplayName "Exchange Support Diagnostics" -Description "This group will provide access to support diagnostics cmdlets within entire Exchange Organization."


Note: These groups will be created by default in "Microsoft Exchange Security Groups" OU assign relevant users to these groups for performing relevant task. Once the task has been performed and the user no longer requires relevant access remove the user from the group.

4. Manual Task using ADSIEDIT
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Note: This is a known bug and will be either fixed in Update Roll Up 5 OR Exchange 2010 SP1

Open adsiedit

Add system account in adsiedit the correct permissions for the Mailbox Store.

Read
Administer information store
Allow Impersonation to Personal Exchange…
Create named properties in the information store
Open mail send queue
Receive as
Send as
View information store status

5. Import Single Mailbox
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Import-Mailbox –Identity “Huzaifah” –PSTFolderPath F:\PST\Huzaifah.PST

6. Bulk Import All Mailboxes
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Get-Mailbox | Import-Mailbox –PSTFolderPath F:\PST

Get-MailboxStatictics -Database "Admin Database"