请使用以下方法恢复:
邮件导出:
New-MailboxExportRequest -Mailbox jiankang -FilePath "\\SERVER01\PSTFileShare\jiankang.pst"
邮件导入:

New-MailboxImportRequest -Mailbox jiankang -FilePath \\SERVER01\PSTFiles\jiankang.pst -TargetRootFolder "RecoveredFiles" -IncludeFolders "#Inbox#"

详细步骤参考以下英文链接:

http://exchangeserverpro.com/exchange-2010-import-pst-files-mailboxes/

http://exchangeserverpro.com/export-mailboxes-exchange-server-2010-sp1/