Requirement for accessing the entire data of the organization in the exchange server

Hi all, Good day.

I have a requirement where need to access the calendar, contacts, and the mailboxes of the entire peoples in the organization. I need to customize the calendar and create my own customized calendar within the outlook and provide access to a particular group. Also i need to create two calendars and compare the same for a single user eg. Say a contact in two domains such as .com and .us. 

kindly advice as how to access and customize the data in the On-premise. I guess in Azure cloud I can achieve this using the Azure Data Factory(not available in Free edition) and I need to go for pay as you go approach. kindly advice on the same and clarify is my understanding correct? I'm using the Outlook 2008 32 bit version.