exchange 导出邮件到pst文件报错 – “Access to the path is denied”

exchange 导出邮件到pst文件报错：

[PS] C:> New-MailboxExportRequest "user1" -FilePath "\MYSERVERPSTuser1.pst"
Unable to open PST file '\MYSERVERPSTuser1.pst'. Error details: Access to the path '\MYSERVERPSTuser1.pst' is denied.
    + CategoryInfo          : NotSpecified: (:) [New-MailboxExportRequest], RemotePermanentException
    + FullyQualifiedErrorId : [Server=MYEMAILSERVER,RequestId=23983583-a349-4c96-bb11-edb7d52b1a0a,TimeStamp=4/4/2016 6:55:33 AM] [FailureCategory=Cmdlet-RemmanentException] 6DE05BB8,Microsoft.Exchange.Management.RecipientTasks.NewMailboxExportRequest

解决：为pst导出的目标服务器文件夹，增加如下权限。