Functions/Get-ExchangeOnlineMailContactPropertyList.ps1

<#
.SYNOPSIS
    This function returns a list of the properties present in an Exchange Online mail contact object which are not present in other Exchange Online contact objects.
#>

function Get-ExchangeOnlineMailContactPropertyList {
    [CmdletBinding(PositionalBinding=$false)]
    [OutputType([String[]])]
    param ()

    # Return the list of properties
    return @(
        "HiddenFromAddressListsEnabled"
    )
}