modifying a user name

Greetings all...

I have a client that requires that when he sends users with
a prefix ie: bla/ that I rewrite or add a realm of @blah.com so it will
proxy correctly to his radius server.  Problem is his dialer program
will not allow a @ symbol until updated.  Anyone with a way to
make this work?
I can strip the prefix but am at a loss on how to add the suffix for these
users.

Please advise

Jean M. Vandette


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