Powershell 将上次登录时间与日期进行比较时出错

我编写了一个脚本，可以让机器上所有用户的所有登录，并过滤掉任何超过30天的内容。我们想用它来更准确地计算我们按用户付费的一些许可证。该脚本还过滤掉我们与系统和服务帐户一起使用的管理员帐户

这是剧本

#This script will check which users have logged on in the last X days
#Set Variables
#Change the number in the parenthesis after adddays to change how far back to filter
#example (get-date).adddays(-30) gets all logins for the last 30 days from     today (-60) would be the last 60 days

$AuditDate = (get-date).adddays(-30)
$ComputerName = $env:COMPUTERNAME
$CurrentDate = Get-Date -UFormat "%Y-%m-%d"

#Delete any previously created files
Get-ChildItem -Path "C:\PowerShellScripts\LastLogon" -Recurse |
Where-Object CreationTime -lt (Get-Date).AddDays(-0) | Remove-Item - ErrorAction SilentlyContinue

#The Login Profile is filtered here
Get-WmiObject -class Win32_NetworkLoginProfile | 
Where-Object -FilterScript {$_.FullName -notlike "*Agvance*"} | 
Where-Object -FilterScript {$_.FullName -notlike "*Sophos*"} |
Where-Object -FilterScript {$_.FullName -notlike "*SSI*"} |
Where-Object -FilterScript {$_.FullName -ne "AgvAdmin"} |
Where-Object -FilterScript {$_.FullName -ne ""} | 
Where-Object -FilterScript {$_.Name -notlike "*SYSTEM*"} |
Where-Object -FilterScript {$_.Name -notlike "*SERVICE*"} |
Where-Object -FilterScript {($_.ConvertToDateTime($_.LastLogon)) -ge $AuditDate} | 
Select-Object  Name,@{label='LastLogon';expression={$_.ConvertToDateTime($_.LastLogon)}} | Export-Csv    C:\PowerShellScripts\LastLogon.csv -NoTypeInformation

#The user count is created here
$number = (Import-Csv C:\PowerShellScripts\LastLogon.csv | measure | % {    $_.Count})

#The file is renamed to include computername, date, and user count
rename-item -path C:\PowerShellScripts\LastLogon.csv -NewName 
C:\PowerShellScripts\LastLogon-$ComputerName-$CurrentDate-UserCount-$number.csv 

脚本按预期工作，但当它运行时，我收到此错误

Exception calling "ConvertToDateTime" with "1" argument(s): "Exception    calling "ToDateTime" with "1" argument(s): "Specified 
argument was out of the range of valid values.
Parameter name: dmtfDate""
At C:\Agvance Updates\LastLogon.ps1:22 char:29
+ Where-Object -FilterScript {$_.ConvertToDateTime($_.LastLogon) -ge $AuditDate} |
+                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ScriptMethodRuntimeException

---

我尝试了比较$.ConvertToDateTime（$.LastLogon）和$AuditDate的不同方法。这种方法是可行的，但我想用$.ConvertToDateTime（$.LastLogon）消除这个错误。是否有更好的方法获取此日期并将其与筛选进行比较？

LastLogon

可能为空，并且

ConvertToDateTime（）

不接受空值

要排除那些没有

LastLogon

值的条目（例如，如果配置文件从未登录到），请尝试：

---

只是为了提高效率-一个单独的-不匹配将所有的测试与

$结合起来。FullName

会加快速度吗

Where Object-FilterScript{$|.FullName-notmatch'Agvance | Sophos | SSI | ^AgvAdmin$^$}

Get-WmiObject -class Win32_NetworkLoginProfile | 
[...]
Where-Object -FilterScript {![System.String]::IsNullOrWhiteSpace($_.LastLogon)} |
Where-Object -FilterScript {($_.ConvertToDateTime($_.LastLogon)) -ge $AuditDate} |
[...]