Thanks for sharing your concerns. Hosting Controller is a hybrid multi-cloud control panel for enterprises, government organizations, etc to fulfill their business needs. For the case studies, you may look into the following links which shall help you in this regard.https://hostingcontroller.com/Resources/Casestudies/Nigeria-Case-Study.htmlhttps://hostingcontroller.com/Resources/Casestudies/Case-Studies.html
For optimization of resources, you can for example have a Hybrid Setup of Exchange where some mailboxes are in your Hosted Exchange(On-Premise environment) and some are hosted on the O365. You can do the onboarding and offloading also. If you want to discuss your scenario concerning optimization, you may open a trouble ticket with email@example.com
and our team will gather information from you according to your environment and will suggest you accordingly.