Exchange 2019中的Unified Messaging(UM)

前天，刚刚安装了测试用的Exchange 2019。安装过程和之前的2016一样，非常顺利。但是在用ECP管理服务器的时候遇到了一个报错。

The term 'Get-UMService' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

直接登录到Exchange服务器上用Management Shell试图运行Get-UMService，还是有报错，说Get-UMService不是有效的cmdlet命令。测试环境中安装的2台Exchange 2019都有同样的问题。看来必须解决。

找到微软的文章Get-UMService
https://docs.microsoft.com/en-us/powershell/module/exchange/unified-messaging/get-umservice?view=exchange-ps

不难发现其中的矛盾之处，适用于包含Exchange Server 2019, 但是正文里没有。Use the Get-UMService cmdlet to view the settings of the Microsoft Exchange Unified Messaging service on Exchange 2013 or Exchange 2016 Mailbox servers.
往下看，在参数描述中又有

那这个命令究竟有没有呢？再找找。
What's discontinued in Exchange Server
https://docs.microsoft.com/en-us/exchange/new-features/discontinued-features?view=exchserver-2019

这篇文章中讲了Exchange 2019中不再使用的功能。其中明确提到了UM服务已经从Exchange 2019中移除了，建议转向SFB。

Unified Messaging has been removed from Exchange 2019. We recommend that Exchange 2019 organizations transition to Skype for Business Cloud Voice Mail.

不知道，到底算不算这篇文章的编辑失误呢？Exchange 2019的ECP中是否应该把2019服务器的UM功能隐藏掉或者修改该一下报错呢？因为毕竟混合环境里2013和2016的Exchange还是有UM组件的。