Calendar updates from users

Hi,

I was asked to create a company calendar/agenda which will show all users agenda(55 users` events/meetings etc.) in one agenda and one user will get notifications(e-mails) from any updates from all users agenda changes.

Is it possible? How can I do that?

We have MS Exchange 2013 standard server and clients have mostly Outlook 2013 and a few 2010.

Thank you very much in advance for your help.

Itechin