1：Install-Module -Name AzureAD
2：Import-Module AzureAD
3：Install-Module MSOnline
4：Import-Module MSOnline
5：$credential = Get-Credential
6：Connect-SPOService -Url https://xxxxxx-admin.sharepoint.cn -credential $credential
7：Set-SPOsite https://omnicommediagroup.sharepoint.cn/sites/OMGChina

8：Set-SPOTenant -ShowEveryoneExceptExternalUsersClaim:$true

切记执行前如果是世纪互联的要先关闭多因子认证，去如下链接关闭：

https://account.activedirectory.windowsazure.cn/usermanagement/multifactorverification.aspx?BrandContextID=O365

https://docs.microsoft.com/en-us/powershell/module/sharepoint-online/Set-SPOTenant?redirectedfrom=MSDN&view=sharepoint-ps