Exchange Server Mailbox Migration

Exporting and Importing Mailboxes for Offline Exchange Server Migration

Exporting from Exchange 2007:

Get-Mailbox | Add-MailboxPermission –user [adminusername] –AccessRight FullAccess –Inheritancetype all
Get-Mailbox -Database “[SERVERNAME]\First Storage Group\Mailbox Database” | Export-Mailbox -PSTFolderPath c:\PSTs
Get-Mailbox -Database “[SERVERNAME]\First Storage Group\Mailbox Database” | Import-Mailbox -PSTFolderPath c:\PSTs
Get-Mailbox | Remove-MailboxPermission –user [adminusername] –AccessRight FullAccess –Inheritancetype all

Single run:

Import-Mailbox -Identity <mailboxUser> -PSTFolderPath D:\PSTs
Export-Mailbox -Identity <mailboxUser> -PSTFolderPath D:\PSTs

Now same thing, but Exchange 2010

New-ManagementRoleAssignment –Role “Mailbox Import Export” –User [DOMAIN\username]
foreach ($i in (Get-Mailbox)) { New-MailboxExportRequest -Mailbox $i -FilePath "\\UNCPath\PSTs\$($i.Alias).pst" }
Get-MailboxExportRequest -Status Completed | Remove-MailboxExportRequest

Same thing, but Exchange 2016 (or probably newer)

New-ManagementRoleAssignment –Role “Mailbox Import Export” –User [DOMAIN\username]
New-MailboxExportRequest -Mailbox ALIAS -FilePath \\UNCPath\PSTs\ALIAS.pst
foreach ($i in (get-mailbox)) { New-MailboxExportRequest -Mailbox $i.Alias -FilePath \\UNCPath\PSTs\$($i.Alias).pst }
foreach ($i in (get-mailbox)) { New-MailboxExportRequest -Mailbox $i.Alias -IsArchive -FilePath \\UNCPath\PSTs\$($i.Alias).pst }
Get-MailboxExportRequest -Status Completed | Remove-MailboxExportRequest

Importing all .Pst files in Exchange 2013 or 2016

(don't forget to ensure New-ManagementRoleAssignment has been set if you're working with a different server AND restart Exchange powershell)

 Dir \\HOSTNAME\e$\PSTs\*.pst | %{ New-MailboxImportRequest -Name RecoveredPST -BatchName Recovered -BadItemLimit 1000000 -AcceptLargeDataLoss -Mailbox $_.BaseName -FilePath $_.FullName}
Get-MailboxImportRequest -Status Completed | Remove-MailboxImportRequest

Same thing, but single maildatabase:

New-MailboxImportRequest -Mailbox [Username] -IsArchive -FilePath \\UNCPath\PSTs\filename.pst

Mailbox Migrations

Move Mailbox from one database to another: Test it to see if a sigle mailbox is ready to move:

New-MoveRequest -identity jhorne -TargetDatabase "DFWLP DEV Mailboxes" -WhatIf

Then move it:

New-MoveRequest -identity jhorne -TargetDatabase "DFWLP DEV Mailboxes"

Move all Mailboxes:

foreach ($i in (Get-Mailbox)) { New-MoveRequest -Identity $i -TargetDatabase "DLP Prod Mailboxes" }

Move Arbitration, Auditlog, and DiscoverySearch:

Get-Mailbox -Arbitration | New-Moverequest -Targetdatabase "Database Name"
Get-Mailbox DiscoverySearchMailbox* | New-MoveRequest -TargetDatabase "Database Name"
Get-Mailbox -Database DLP-PROD01 -AuditLog | New-MoveRequest -TargetDatabase "Database Name"

List all mailboxes:

Get-mailbox

List all mailboxes and show current database:

Get-Mailbox | fl alias,database

List current migration jobs:

Get-MoveRequest
Get-MoveRequestStatistics -Identity username | fl
Get-MoveRequestStatistics -Identity username | fl totalmailboxitemcount,bytestransferred,itemstransferred,PercentComplete

Remove completed migration jobs:

Get-MoveRequest -MoveStatus completed | Remove-MoveRequest