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Enable-DistributionGroup

Use the Enable-DistributionGroup cmdlet to mail-enable existing universal security groups and universal distribution groups that aren't already mail-enabled. Exchange PowerShell reference

From the Exchange PowerShell reference 7 parameters Its page in the reference

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Parameters

7 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the universal security group or universal distribution group that you want to mail-enable.
-AliasThe Alias parameter specifies the Exchange alias (also known as the mail nickname) for the recipient.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-DisplayNameThe DisplayName parameter specifies the display name of the group.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-PrimarySmtpAddressThe PrimarySmtpAddress parameter specifies the primary return email address that's used for the recipient.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.