There are different reasons why companies consider hosting their Exchange services on-premise. One of the most important is that you can control all hardware and data, giving complete access for troubleshooting purposes if necessary; however, this also means higher maintenance costs and providing 100% availability (which may not always be possible).

When you migrate to Office365, you receive several significant advantages as compared on-premise. Some of them include:

Office 365 is your one-stop-shop for all of the tools you need to get work done. Not only does it offer scalability without any additional spend, but with purchase comes hosting and Email accounts—saving time on installation costs.
The cost of operating an on-premise server is high, with constant maintenance needed. You can’t say the same for Microsoft Office 365—you only pay once, and then it's easy as pie.
Microsoft ensures the security of your data with its disaster recovery plans. You could rest assured that you would still have access and control over what happened in Settings if something were to happen.
With an automatic update service, you can rest easy knowing that your server is up-to-date and protected. There are no more worries about downtime or other such situations

To know more about Migrate User from on premise Exchange to Office 365, visit O365CloudExperts.