====== Export/Import users mailbox into PST file using PowerShell ======
Grant admin user the privilege to import/expoer mailboxes
<code bash| Add role>New-ManagementRoleAssignment -Role "Mailbox Import Export" -User Administrator</code>
Create a network share with **Exchange Trusted Subsystem** group r/w permissions

Check the mailbox size:
<code powershell| Get mailbox size>get-mailboxstatistics username | format-table displayname,TotalItem*</code>
Export mailbox to PST, and see the export status
<code powershell| Export mailbox to PST>
New-MailboxExportRequest -Mailbox username -FilePath \\server\share\file.pst
Get-MailboxExportRequest
Get-MailboxExportRequest -Name MailboxExport | fl
Get-MailboxExportRequest | Get-MailboxExportRequestStatistics
Get-MailboxExportRequest | where {$_.status -eq "Completed"}
Get-MailboxExportRequest | where {$_.status -eq "Completed"} | Remove-MailboxExportRequest
</code>

Import PST into the new mailbox - first line imports into root, the second line creates a folder and imports into that folder
<code powershell| Import PST into mailbox>
New-MailboxImportRequest -FilePath \\server\share\file.pst -Mailbox uname
New-MailboxImportRequest -FilePath \\server\share\file.pst -Mailbox uname -TargetRootFolder "Old data"
Get-MailboxImportRequest
Get-MailboxImportRequest | Get-MailboxImportRequestStatistics
Get-MailboxImportRequest | where {$_.status -eq "Completed"} | Remove-MailboxImportRequest
</code>

Export all mailboxes
<code powershell| export all mailboxes>
foreach ($Mailbox in (Get-Mailbox)) { New-MailboxExportRequest -Mailbox $Mailbox -FilePath "\\<server FQDN>\<shared folder name>\$($Mailbox.Alias).pst" }
</code>

Suspend and resume export request
<code powershell>
Suspend-MailboxExportRequest -Identity "Ayla\MailboxExport"
Resume-MailboxExportRequest -Identity kweku\export
</code>