Why am I getting errors when trying to run Get-Transportconfig in a Powershell session?

Question

I am trying to run Powershell to invoke Set-TransportConfig on my Exchange mailbox. Windows Powershell ISE is running elevated as admin.

I am able to connect to Exchange:

Connect-ExchangeOnline -UserPrincipalName 

When I attempt to run this command:

Get-TransportConfig -SmtpClientAuthenticationDisabled

I get the following error:

Get-TransportConfig : The term 'Get-TransportConfig' 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. At line:1 char:1

• Get-TransportConfig -SmtpClientAuthenticationDisabled

•   + CategoryInfo          : ObjectNotFound: (Get-TransportConfig:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  

If I run the following:

get-command *transportconfig*

It does not return any commands:.

I've tried running:

Import-Module ExchangeOnlineManagement
Install-Module ExchangeOnlineManagement

It does not return any errors or results (Does that mean it's correctly installed?)

Why can't I run the Get-TransportConfig command? What am I doing wrong here? Am I missing an additional library?