# Exchange Online

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

## Backups

Backups run according to the schedule and settings that are specified in the backup plan, which the Commvault Cloud software automatically assigns to the each Microsoft 365 app based on the region.

### Data You Can Back Up

- Content

  - Emails

    - Encrypted emails (S/MIME and Microsoft Purview Message Encryption), preserving encryption in the backed-up data.

  - Calendars

  - Contacts

  - Tasks

  - Notes

- Mailboxes

  - Primary mailboxes

  - Archive mailboxes

  - Group mailboxes

  - Shared mailboxes

  - Public folder mailboxes

  - Team mailboxes

- Microsoft Purview labels

### Backups You Can Perform

Forever incremental backups

### When You Can Perform Backups

- On a schedule: The backup plan that you assign manages scheduled backups

  For new customers who onboard after April 19, 2024, two schedules are created for each Microsoft 365 backup plan during the onboarding process. Existing customers will continue to use the same single schedule. The two new schedules work as follows:

  - Schedule 1: A backup job for items that do not meet SLA runs once every 8 hours. The job commits after 32 hours. All items that were never backed up or backed-up items that are older than 30 days are included in the backup.

  - Schedule 2: A backup job for items that meet SLA but were not recently backed up runs once every 8 hours. The job commits after 22 hours. All items that are more than 17 hours old and less than 30 days old are included in the backup.

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

- An attempt to back up M365 entities will occur once in a 24 hour period.

## Restores

### 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

Microsoft Purview labels are retained during restore.

### 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

- Archive mailboxes (out of place)

Note

In-place and out-of-place restores to group mailboxes are not supported.

## Considerations

- 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.

- Only tenant administrators can enable archive mailbox and only for the Enterprise plan. For instructions, see Configuring Standard and Enterprise Plans for O365.

- Performance of backup and restore operations depend on the ability of Microsoft APIs to discover, access, and read data. This can be affected by extremely large folder nesting hierarchy and number of files in all mailbox types.

- Users cannot delete data from Exchange apps when compliance lock is enabled on a storage policy copy. Users also cannot reduce the retention period for Microsoft 365 and Server plans in this state. To delete data, disable compliance lock on the associated storage policy copy.

## Supported Regions

Region | Description
--- | ---
Default Global Region | The default global version for enterprise, Business Essentials, and academic Microsoft 365 tenants.
GCC Cloud Region | For U.S. federal, state, local, and tribal governments, and contractors that process data on behalf of the U.S. government.
GCC High Cloud Region | For the U.S. Department of Defense (DoD) and contractors that process DoD controlled unclassified information (CUI).

## Authentication

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

## Retention

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 Commvault Cloud. The default value for data retention is 3 years for the Enterprise plan and 1 year for the Standard plan. 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 the retention settings in the O365 plan will expire.

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