Exchange 2016 Introduction Part II

the Advantages of deploying on premise Exchange:

• Mailbox data is local in your own infrastructure and under your control
• Upgrades and configuration changes performed as and when required
• Backup’s performed and controlled in house
• Utilizing your own hardware and infrastructure
• Integration and co-existence with existing systems such as SharePoint 
• Ability to install 3rd party application onto the Exchange servers like Sonic-wall Mail security 

Disadvantages as of Exchange   :

• administrative  skills and resources required to maintain Exchange as well as the infrastructure  
• Investment and ongoing maintenance of the infrastructure hardware

Advantages of Office 365 :

• High Availability with a 99.9% SLA
• Increased Mailbox and Archive Mailbox storage options
• No  costs for internal infrastructure, servers or storage required  
• Ease of Implementation
• Upgrades and new functionality handled by Microsoft  
•  meeting all the requirements of Government and Overseas organization for security and Data handling

Disadvantages of Office 365

• Complicated migration steps and hybrid model setup
• Integration with an 3rd party applications and any on premise services can be difficult and unsupported
• Mailbox Data store in a Microsoft approved location  
• most of Governance regulation require company Data to be in same country – specially finance agencies 
• Data can be stored overseas and therefore susceptible to laws and regulations of other countries