Rename Multiple Users

[TechMofo]

Hi,

 

We have a Mac server running El Capitan, with about 30 clients. We're in the process of recreating all of the student accounts, for various reasons.

 

I want to keep the old accounts for the time being, but is there a way of renaming multiple accounts in one go? We use Passenger to create multiple accounts, but can't seem to find a way of renaming the old ones (unless I'm being thick!).

 

Any help would be appreciated!

 

Cheers