Hi,
You can use the following command to import PST files to an archive folder:
New-MailboxImportRequest -Mailbox <MailboxLocationIdParameter> -FilePath \\server\share\User.pst -IsArchive -TargetRootFolder <String>
For more details: Procedures for mailbox imports from .pst files in Exchange Server
For importing different pst files to different mailboxes, you can use the following command to import multiple pst files:
Dir \\sharedpath\*.pst | %{ New-MailboxImportRequest -Name <String> -BatchName <String> -Mailbox $_.BaseName -FilePath $_.FullName -TargetRootFolder <folder name>}
This command imports all of the .pst files on a shared folder. Each .pst file name is named after a corresponding user's alias. The command creates an import request for all the .pst files and imports the data into the matching mailbox.
You can check this thread for detailed test results: How to migrate mdaemon mailbox
into exchange 2016?
Regards,
Lydia Zhou
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