前提条件邮件服务器加入AD域，你用域管理员登入拥有100%的权限安装，如果你想自己创建一个域账号需要附加几个权限
1：Enterprise Admins
2：Domain Admins
3：Schema-Admins
1下载
https://docs.microsoft.com/zh-cn/exchange/new-features/updates?view=exchserver-2019
下载最新Exchange 2019 版本 U11
5大组件
a. .NET Framework 4.8
b. Visual C++ Redistributable Package for Visual Studio 2012
c. Visual C++ Redistributable Package for Visual Studio 2013
d. Unified Communications Managed API 4.0
上面四大组件安装完成后重启
e. IIS URL 重写模块 (先装上面四个组件，这个等会安装)
桌面版Windows组件
已管理员运行方式打开Windows PowerShell 运行下面这个安装组件代码 （安装完成后，安装上面的五大组件 e----重启）
Install-WindowsFeature Server-Media-Foundation, NET-Framework-45-Features, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Clustering-CmdInterface, RSAT-Clustering-Mgmt, RSAT-Clustering-PowerShell, WAS-Process-Model, Web-Asp-Net45, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext45, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI, Windows-Identity-Foundation, RSAT-ADDS
准备AD和域 (我的AD域为dotcomlab.net)
已管理员运行方式打开Windows PowerShell 运行
1：扩展AD架构
CD 切到系统安装盘符 我在在E盘 e:
E:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareSchema
2：准备AD
E:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareAD /OrganizationName:dotcomlab
3：准备AD域
E:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareDomain:dotcomlab.net
先决条件安装完成后Exchange2019系统光盘下一步，直接完成
