I need to bulk modify the email address of many distribution lists in the same OU.

Currently they are autogenerated by RUS and my default policy filter rules state "(mailnickname=*)" (all quotes are mine). The recipient policy default SMTP address is "@domain.com".

The group names are "Store ### - Location" so the email addresses generated as Store###-Location@domain.com 

Now I want to change all the lists so the email addresses are Location@domain.com.

Any ideas on how this can be done?

Marcina