How can add all member of a Dynamic Distribution group to a new Security Group

Hi everyone

We have a dynamic distribution group in our Exchange Server, I need to create a new Security Group in Active Directory and add all members of the dynamic distribution group to this Security Group (for other purpose), I think PowerShell script on cmdlet command shall be required to export members of dynamic distribution group and to add to security group but I don't know how to execute this action !?

kindly help me