Get-NestedDLMembers

Have a distribution list with a bunch of nested groups?  Want to get a flattened member list? This is what you need.
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#                         Get-NestedDLMembers.ps1
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# This will expand and flatten a Distribution List with nested groups into a
# single global array $Members. By default it will only output the
# PrimarySmtpAddress but additional properies can be added with the -properties
# switch (Note that the properties must be quoted and comma separated. By default
# it pulls all RecipientTypes which can be narrowed to a single RecipientType
# with the -UserType switch (UserMailbox, MailUser or MailContact).
#
# Syntax:
#    Get-NestedDLMembers.ps1 -DLName <DistributionList> -Properties
#    "CustomAttribute1","CustomAttribute2","RecipientType"
#
# Note that member deduplication is done by default.
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#
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# Created by David Dean <david@sycho.net>
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