Office 365 is a Microsoft service that includes access to Office suite of applications and productivity services such as SharePoint that are enabled via cloud services. IOT has procured a subset of these services such as Exchange Online for email and SharePoint Online for collaboration.
For more information on Office 365 services, visit help.iot.in.gov : https://iot-ingov.zendesk.com/hc/en-us/categories/360002771232-Office-365