1. workflow 流程走不下去，报 workflow fails to run 的错误
请确保下面二个service要么都start，要么都stop：
Microsoft SharePoint Foundation Web Application
Microsoft SharePoint Foundation Workflow Timer Service
2. 安装sharepoint prerequisit总是在web server （iis）这步不断地重启
检查web server （iis）前面是不是有个红叉，如果有，先fix，有时是相关的service没有启动起来。
3. SharePoint 不能在线编辑
运行下面脚本：
$a = New-SPUserLicenseMapping -SecurityGroup "Domain Users " –License OfficeWebAppsEdit
$a | Add-SPUserLicenseMapping Enable-SPUserLicensing4. wcf data service 5.6安装失败
从这里下载，单独安装：
5. Cannot connect to database master at SQL server at xxx
New-SPConfigurationDatabase:
Cannot connect to database master at SQL server at servername. The database might not exist,
or the current user does not have permission to connect to it
solution: run -> cliconfg
go to alias tab, check if it is full server name.
6. "URL" is already routed to the Default zone of another application. Remove that mapping or use a different URL
当创建web application 时，有时会报这个错，虽然已经删除了这个web application，再重建。
solution: 关闭powershell ， 再次打开即可。
7. 不能打开web application ( root site )
检查dns
ipconfig /flushdns
restart iis.