SharePoint Online：使用 PowerShell 查找内容类型中的网站栏使用情况

要求：在 SharePoint Online 网站集中的内容类型中查找网站列使用情况。

一点背景知识：当尝试删除 SharePoint Online 中的网站栏时，收到一条错误消息：“无法删除内容类型中包含的网站栏。在删除此网站栏之前先删除对此网站栏的所有引用”。

那么，如何找到网站栏被使用的地方呢？

PowerShell 查找内容类型中的网站栏使用情况：

此 PowerShell 脚本循环访问网站中的所有内容类型，检查其中是否引用了特定网站列，并输出结果。

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"

#Function to get a particular Site column usage in content types 
Function Get-SPOSiteColumnUsage([String]$SiteURL, [String]$SiteColumnInternalName)
{
    Try{
        Write-host -f Yellow "Processing Site:" $SiteURL

        #Setup the context
        $Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
        $Ctx.Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
    
        #Get All Content Types of the Web
        $Ctx.Load($Ctx.Web)
        $Ctx.Load($Ctx.Web.Webs)
        $ContentTypes = $Ctx.web.ContentTypes
        $Ctx.Load($ContentTypes)
        $Ctx.ExecuteQuery()

        #Leave Hidden content types
        $ContentTypes = $ContentTypes | Where {$_.Group -ne "_Hidden"}
        Write-host -f Yellow "`t Found $($ContentTypes.count) Content Types"

        #Loop through each content types Field
        ForEach($ContentType in $ContentTypes)
        {
            Write-host -f Yellow "`t `t Scanning Content Type $($ContentType.Name)"
            $Ctx.Load($ContentType.Fields)
            $Ctx.ExecuteQuery()

            ForEach($Field in $ContentType.Fields)
            {
                If($Field.InternalName -eq $SiteColumnInternalName)
                {
                    Write-host -f Green "`t `t Found the Site Column in Content Type '$($ContentType.Name)' at Site '$($SiteURL)'"
                }
            }
        }

        #Iterate through each subsite of the current web
        foreach ($Subweb in $Ctx.web.Webs)
        {
            #Call the function recursively
            Get-SPOSiteColumnUsage $Subweb.url $SiteColumnInternalName
        }
    }
    Catch {
    write-host -f Red "Error Generating Site Column Usage Report!" $_.Exception.Message
    }
}

#Config Parameters
$SiteURL="https://crescent.sharepoint.com"
$SiteColumnInternalName="TotalInvestment"

#Get Credentials to connect
$Cred= Get-Credential

#Call the function to get the content type usage
Get-SPOSiteColumnUsage $SiteURL $SiteColumnInternalName 

该脚本扫描所有内容类型并打印结果：