Hi, thanks for submitting your question today. My name is XXXXX XXXXX I’m happy to assist you with your question today.
The answers to your specific questions are as follows:
Do I need to serve Individual a, b, c separately from Company X (Company X has an attorney appointed). Or one Summons list Company X, a, b, c will serve as a whole? -- Generally you would have to serve them separately. But you could call company X's attorney and see if he/she is representing and will accept service for individuals a, b and c also.
The Attorney of Company Z said he is not authorized to receive Summons for Company Z and /or its employees. So I will have to serve company Z , e, f, g, h separately, am I right? -- Correct
Use Sheriff cost a lot if I serve the Summons Separately (9X 60), may I do it by my self or by my relative / friends in state of MA? -- No. Unfortunately the Mass Rules of Civil Procedure require the sheriff to serve all process.
I believe this answers your question. However, if you need clarification or have follow-up questions regarding this matter, I will be happy to continue our conversation – simply reply to this answer. If you are otherwise satisfied with my response, please leave a positive rating as it is the only way I am able to get credit for my answers. Thank you, XXXXX XXXXX wish you all the best with this matter.