Exchange 2010 - Bulk Rename of Distribution Groups

I'm new to Exchange 2010 and have been tasked with renaming hundreds of Distribution Groups. It involves across the company title changes.

Example - Rename GroupDSM@mycompany.com to GroupRSM@mycompany.com. Each group has 4 SMTP addresses in which the DSM has to change to RSM. There are many other groups with DSM in the names (Alias, Description, Display Name, SMTP, etc.).

Is there a cmdlet to accomplish this?
AtriaSupportAsked:
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Jian An LimSolutions ArchitectCommented:
in short, there is no "a cmdlet" to accomplish this.

you need to use powershell combine with some logic to get all of them change. and it is not easy at all.
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