For more information on these group types, see the ??? Exchange
Server 2007 Group Objects ??? section earlier in this chapter. In this section, we cover the creation and
modification or management of these group types. Keep in mind a significant change in the default
configuration of group objects in Exchange Server 2007. By default mail - enabled groups created in
Exchange Server 2007 will only accept messages from authenticated users. This would prevent external
users from sending messages to the group or emailing spam to a large number of users in the
organization. In Exchange Server 2000 and 2003, by default, the Distribution Group accepted messages
from everyone.
To create a new Mail - Enabled Universal Distribution or Security Group, use the
New-DistributionGroup cmdlet. This cmdlet requires that the Name, Organizational Unit,
SAMAccountName, and Type be specified. The Type parameter determines whether the group
is a Distribution or Security Group:
New-DistributionGroup -Name ???ExchUDG??? -OrganizationalUnit Users -SAMAccountName
???ExchUDG??? -Type ???Distribution???
New-DistributionGroup -Name ???ExchUSG??? -OrganizationalUnit Users -SAMAccountName
???ExchUSG??? -Type ???Security???
To mail - enable an existing Universal group in Active Directory, use the Enable-DistributionGroup
cmdlet.
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