Lync Server在父子域環境中使用圖形界面擴展AD架構失敗

問題描述：

過lync圖形界面進行lync擴展的時候出現以下錯誤：

未將對象引用設置到對象的實例

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緣由分析：

查詢資料給出以下解釋：

The Enable-CsAdForest Lync Server command is designed to run from the Active Directory Domain Services forest root domain for security purposes. If the pre-existing RTC Universal security groups do not exist in the Active Directory Domain Services forest root domain the Enable-CsAdForest Lync Server command will fail with an error that is similar to the one listed in theSymptomssection of this article.

參考資料：

http://social.technet.microsoft.com/Forums/zh-CN/827804c1-690b-45c3-93d8-426c66a9a82c/forest-preparation-failed-lync-2013-std-object-reference-not-set-to-an-instance-of-an-object

http://support.microsoft.com/kb/2549544

解決方法：

三、 當前環境AD林擴展用圖形界面是不能成功的，須要用命令加參數來完成因而輸入以下參數

Enable-CsAdForest -GroupDomain contoso.com -GlobalSettingsDomainController DC02.contoso.com -GroupDomainController DC02.contoso.com -GlobalCatalog DC02.contoso.com Verbose

擴展成功