You can use the below cmdlets to Connect to the 21V Hosted Office365 Environment.
Open PowerShell in Elevated Mode and run the following commands,
Set-ExecutionPolicy -ExecutionPolicy unrestricted $UserCredential = Get-Credential 
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://partner.outlook.cn/PowerShell -Credential $UserCredential -Authentication Basic -AllowRedirection 
Import-PSSession $Session -DisableNameChecking 
You can see how it is connected. You can run the Cmdlets for Exchange Online and validate.