Understanding Exchange 2010 On-Premises versus Exchange Online Archiving

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For those in Office 365 and need a mail archiving solution, this provides a great analysis and comparison regarding Exchange 2010 On-Premises versus Online Archiving features, functions and capabilities:

Client Support
  • Microsoft Office Outlook® 2010 and Outlook 2007 connectivity, including Outlook Anywhere
  • Web-based access with Outlook Web App on Internet Explorer, Firefox, Safari, and Chrome
  • Ability to delegate access to the archive
  • Unlimited size archives that help you worry less about email storage limits within your organization
  • Built-in email archiving to provide a native experience for your users
Data Protection
  • 99.9% uptime commitment with a financially backed service level agreement
  • Continuous data backup between globally-redundant datacenters
  • Deleted item retention and deleted mailbox recovery
  • Continuous intrusion monitoring and detection
  • HTTPS connections to help keep access secure
Retention and Compliance
  • Unlimited time period, rolling Legal Hold capability to immutably preserve content
  • Policies to automatically expire email data or preserve it for compliance purposes
  • Ability to search multiple user mailboxes at ­­­once
  • Allows compliance officers to review and annotate discovered messages
  • Support via phone and web—24 hours a day, seven days a week
  • Centralized, web-based access for configuration and administration of Exchange Online Archiving services
  • Remote PowerShell™ connections for advanced configuration and automation
  • Role-based access control (RBAC) for fine-grained control of administrative permissions