With time technology changes thus preferences change. A lot of reasons are initiating users to migrate Exchange 2010 to Office 365. Office 365 being a cloud-based service provides easy accessibility and always remains updated. Office 365 offers many user-oriented services like Skype for Business, Hosted Exchange Server, and Share Points thus very popular among users. Users no need to maintain anything hence maintaining cost is null; users just have to subscribe plan as per the need. Office 365 being Microsoft's product is also most-secured data center for the users; no concern of data loss. So, know your preferences and go with the appropriate one.