Enable MFA for all Office365 users at once with PowerShell

Now that Multi Factor Authentication is widely supported through all the different PowerShell modules within Office365 and Azure it's a good idea and a best practice to enable MFA for all accounts. Especially admin accounts.

So how do we do this?
After connecting to the MSOnline service with PowerShell run:

$auth = New-Object -TypeName Microsoft.Online.Administration.StrongAuthenticationRequirement            
            
$auth.RelyingParty = "*"            
            
$auth.State = "Enabled"            
            
$auth.RememberDevicesNotIssuedBefore = (Get-Date)            
            
Get-MsolUser –All | Foreach{ Set-MsolUser -UserPrincipalName $_.UserPrincipalName -StrongAuthenticationRequirements $auth}

All users are now "enabled" for MFA.
This should give you a lot of extra brownie points on your secure score rating :-)