Can I have a Message waiting light for Phdn 500 on multiple phones, or only on the phone of the owner of 500?

If so, is there a limit to # of phones.
I have a small group of people who when a call is transferred to 500, anyone available can/will answer, but if no one is available, the call goes to IVP8 r2 mbx 500 and lights light.

Customer wants to make some changes and I am looking at options.
Thanks.