Difference between Exchange online vs Exchange on Premises


Exchange on Cloud Exchange on Premises
Cost Flexible, allows you to pay for licenses on a per-user basis Responsible for arranging and maintaining the Exchange server and server hardware
Security Microsoft handles security so there will be a reduced risk of losing your email data. Your IT department will be completely responsible for maintaining your Exchange system around-the-clock.
Upgrades Automatic updates Need to perform upgrades manually
Availability The high availability of Exchange Online is supported by a 99.9% SLA and is built within the platform. The availability of Exchange On-Premises is subject to server failure.
Storage For Enterprise E1 and E2 business plans, a mailbox with a capacity of 100 GB. Mailbox quotas are depending on organization requirements.
Management and Control If you are looking for greater administrative control over your infrastructure, then this not the right choice. If you are looking for greater administrative control over your infrastructure, then this is the right choice.

Mails in Exchange Online

  • Using Microsoft 365 and Office 365, you can rearrange how email is delivered to your organization's mailboxes. 
  • The path of email from internet to mailbox and vice versa is called mail flow. 

  • Depending on the business requirements, organizations manage all their mailboxes and filtering. 

Collaboration in Exchange Online

Microsoft 365 or Office 365 and Exchange Online provide several features that can help your end users easily collaborate in email. 

Features are as follows- 

1) Public Folders

  • Public folders are designed for shared access and provide an easy and effective way to collect, organize, and share information with other people in your work-group or organization.
  • Public folders organize content in a deep hierarchy that's easy to browse.

2) Shared mailboxes

  • A shared mailbox is a mailbox that multiple designated users can access to read and send email messages and to share a common calendar. Shared mailboxes can provide a generic email address. Example – [email protected]

3) Groups

  • Groups are a collection of two or more recipients that appears in the shared address book. When an email message is sent to a group, it's received by all members of the group.
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