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Remove-DynamicDistributionGroup

Use the Remove-DynamicDistributionGroup cmdlet to delete dynamic distribution groups. Exchange PowerShell reference

From the Exchange PowerShell reference 5 parameters Its page in the reference

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Parameters

5 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the dynamic distribution group that you want to remove.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-IgnoreDefaultScopeThe IgnoreDefaultScope switch tells the command to ignore the default recipient scope setting for the Exchange PowerShell session, and to use the entire forest as the scope.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.