定义邮件主题这个变量：
$Subject = "明天放假1天"
创建相关的任务：如果用all代替[email protected]，则是搜索所有邮箱
New-ComplianceSearch -Name ContentSearch_Report2025 -ExchangeLocation [email protected] -ContentMatchQuery "subject:$($Subject)"
启动此任务：
Start-ComplianceSearch -Identity ContentSearch_Report2025
删除[email protected]这个邮箱里相关主题的邮件：
New-ComplianceSearchAction -SearchName ContentSearch_Report2025 -Purge -PurgeType SoftDelete
查看任务执行结果：
Get-ComplianceSearch -Identity ContentSearch_Report2025| FL name,items,size,jobprogress,status
查看bob邮件导出状态：
Get-MailboxExportRequest -Identity bob
取消任务：
Suspend-MailboxExportRequest -Identity bob
Remove-MailboxExportRequest -Identity bob