Exchange Online


You can use the Metallic software to back up and restore Microsoft Exchange Online.


Backups run according to the schedule and settings that are specified in the server plan, which the Metallic software automatically assigns to the each Office 365 app based on the region.

Backups run automatically every 8 hours. If a backup is already running, then the 8-hour-interval backup is skipped.

Data You Can Back Up

  • Content

    • Emails

    • Calendars

    • Contacts

    • Tasks

Note: Teams chat messages, which were previously stored under the TeamsMessagesData folder in the mailbox, are no longer backed up using the Exchange Online because of changes made by Microsoft.

  • Mailboxes

    • Primary mailboxes

    • Archive mailboxes

    • Group mailboxes

    • Shared mailboxes

    • Public folder mailboxes

    • Team mailboxes

      Note: To enable archive mailbox backup, you must open a support ticket using the Metallic Customer Support Portal.

Backups You Can Perform

  • Forever incremental backups

When You Can Perform Backups

  • On a schedule: The server plan that you assign manages scheduled backups

  • On demand: You can perform on-demand backups at any time

Backups You Can Use for Restores

  • The most recent backup: For example, restore the most recent backup to its original location

  • A backup from a specific date: For example, restore data to a point in time before it became unusable

  • Backups from a date range: For example, restore data that was accidentally deleted

Destinations You Can Restore To

  • The current location (in place)

  • A different folder on the same mailbox, or a different Exchange mailbox (out of place)

  • A CAB or PST file

Note: Out of place restores to archive mailboxes are not supported. You can restore only in place to archive mailboxes.

Supported Regions



Default Global Region

The default global version of Dynamics 365 available for enterprises, where enterprise, business essentials, and academic Dynamics 365 tenants reside.

GCC Cloud Region

The U.S. federal, state, local, or tribal government, and contractors holding or processing data on behalf of the U.S. government.

GCC High Cloud Region

The United States Department of Defense, as well as contractors holding or processing DoD controlled unclassified information.


Modern authentication is used to access data for backups and restores.


Data is retained according to the Office 365 plan that you assign to a mailbox when you add it to the Exchange Online app in Metallic. The default value for data retention is indefinite. You can modify that value to limit the amount of time that data is retained.

The index server is scanned every 24 hours. Messages that are eligible for data aging based on their received time and the rules defined in the plans are pruned.