Once you initiate a bulk import or Export in Exchange 2013
Exchange administration Center starts alerting you the status of the import requests. Which is Good.
Commands to Bulk Import
$Import = Get-Mailbox
$Import|%{$_|New-MailboxExportRequest –FilePath “\\ServerName\pst\$($_.primarysmtpaddress).pst”}
Now if I want to view the queue. How ? . There is a parameter called –RequestQueue , That should help us.
if you run the below command below , It should get us the Percent Complete in bulk.
Open Exchange management Shell , Run below command
Get-MailboxImportRequestStatistics -RequestQueue “Mailbox database”
Its just a little info. But Its good to know.