How to omit powershell parameter from cmdlet if value not provided?

Question

I\'m trying to execute a below Powershell command to create a new address list on exchange server with parameters like Name, Container, etc.

Container is an

Answer 1

Have a look at the documentation for the -Container parameter in New-AddressList: https://docs.microsoft.com/en-us/powershell/module/exchange/email-addresses-and-address-books/new-addresslist?view=exchange-ps#optional-parameters

Specifically:

If you don't use this parameter,the address list is created under the root (\).

...

Default value: None

$container = $null
New-AddressList -Container $container

# or...

$container = "\"
New-AddressList -Container $container