Question

该脚本打开与O365的连接，然后遍历所有邮箱，查找可能是恶意的收件箱规则。

在我们的12K邮箱组织中，此脚本需要超过24小时才能运行。

$CloudCredentials = import-clixml C:\tools\CloudCreds.xml
Write-Host "Connecting To Exchange Online..." -foregroundcolor white
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell `
                    -Credential $CloudCredentials -Authentication Basic -
AllowRedirection -WarningAction SilentlyContinue
Import-PSSession $Session -Prefix Cloud -DisableNameChecking -AllowClobber | Out-Null
Connect-MsolService -Credential $CloudCredentials
Invoke-Command -Session (Get-PSSession | ?{$_.state -eq "Opened"}) -ScriptBlock {GEt-Mailbox -resultsize unlimited | Select-Object PrimarySMTPAddress,UserPrincipalName}
foreach ($MB in $MBs) {    
    $Rules=@()
    $Rules += Get-CloudInboxRule -Mailbox $MB.UserPrincipalName -WarningAction SilentlyContinue
    if ($Rules.Length -gt 0) {
        foreach ($R in $Rules) {
            if (($R.Name -eq "postmaster") -or
                ($R.Name -eq ".net") -or
                ($R.Name -eq ".com") -or
                ($R.Name -eq ".org") -or
                ($R.Name -eq ".")
               )
           {
           write-host $MB.UserPrincipalName
           #Remove-CloudInboxRule -Mailbox $MB.UserPrincipalName -Id $R.Name -Confirm:$false
           }
        }
    }
}

Get-InboxRule（此处重命名为Get-CloudInboxRule）迭代似乎花费的时间最长。按照目前的情况，此代码每1000个邮箱大约需要1个小时。这意味着对于我们的15K用户来说，这需要15个小时来扫描......在垃圾邮件开始之前尝试查找恶意规则的时间很长。

p.s这张贴在SuperUser上，但我意识到它是一个Powershell编程问题，而不是真正的poweruser问题。

Answer 1

您可能希望查看用于并行处理的Powershell工作流程，我没有在该规模上使用它，但它应该加速大型或慢速“ForEach”循环。当我必须连接或ping大量计算机时，我通常会使用它。

示例代码

CLS

### Worflows, Functions, etc.

#Workflow
workflow CheckMailBoxesForBadRules
{    
    #Mailboxes
    $MailBoxes = @(
        @{Name="Mailbox1"; Rules=@('rule1','rule2','rule3')}
        @{Name="Mailbox2"; Rules=@('rule1','rule2')}
        @{Name="Mailbox3"; Rules=@('rule1','rule3')}
        @{Name="Mailbox4"; Rules=@('rule2','rule3')}
        @{Name="Mailbox5"; Rules=@('rule1')}
        @{Name="Mailbox6"; Rules=@('rule2')}        
        @{Name="Mailbox7"; Rules=@('rule3')}
        @{Name="Mailbox8"; Rules=@()}
        )


    ForEach -Parallel ($Mailbox in $MailBoxes)
    {    
        $BadRules = @()
        Foreach ($Rule in $Mailbox.Rules) 
        {
            #logic
                $BadRules += $Rule
        }

        If ($BadRules){
            "$($MailBox.Name) " +
            "bad-rules: $($BadRules -join ", ")"
        }
    }
}

### Script Execution

# Workflow Start
CheckMailBoxesForBadRules

输出

Mailbox7 bad-rules: rule3
Mailbox6 bad-rules: rule2
Mailbox5 bad-rules: rule1
Mailbox4 bad-rules: rule2, rule3
Mailbox3 bad-rules: rule1, rule3
Mailbox2 bad-rules: rule1, rule2
Mailbox1 bad-rules: rule1, rule2, rule3

如何更好地优化此O365 powershell脚本？

1 个答案: