New-AddressList
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To create a new folder entry in the GAL.
New-AddressList -Name 'Bentley' -DisplayName 'Bentley' -RecipientFilter {((RecipientType -eq 'UserMailbox') -and (City -eq 'Perth') -and (Office -eq 'Bentley'))} -Container '\Geographical Address Lists\Australia\Perth'
For a list of fields that can be used in the RecipientFilter parameter.
Microsoft : Filterable Properties for the -Filter Parameter