Exchange Online Mailboxes

Microsoft Exchange Online is a SaaS application that is bundled in your Microsoft 365 subscription service. It is a hosted messaging solution that delivers the capabilities of Microsoft Exchange Server as a cloud-based service. It gives users access to email, calendar, contacts, and tasks from PCs, the web, and mobile devices. Using the policy-based data protection solution from Cohesity DataProtect as a Service, you can protect Exchange Online data on Microsoft 365.

This topic covers the following:

Considerations

• The exported PST of the mailbox items is valid for 7 days. Ensure you download the PST file within 7 days of the completion of the recovery task.

• PST Download of the SubstrateHolds folder in Recoverable Items is not supported.

• Backup and download of the following is not supported:

  • Self-message (messages sent to self)

  • Saved or pinned messages property in the conversation

  • Meeting recordings metadata from private chats

  • Emojis

• In Recoverable Items,

  • only deletions, Purges, Discovery Holds, and SubstrateHolds folders are currently supported.

    This is a Private Preview feature. Cohesity recommends you use this feature only in non-production environments. Contact your Cohesity account team to enable the feature.

  • Audits, Calendar Logging, and Versions folders are not supported.

• SubstrateHolds folder is not supported in Archive Recoverable Items.

• Granular recovery and search is not supported for Recoverable Items. The admin must recover the complete mailbox to recover the Recoverable Items.

• Converted-shared mailboxes are not backed up by default. To enable backup of converted-shared mailboxes, contact Cohesity Support.

• The Retirement of RBAC Application Impersonation in Exchange Online does not impact the Microsoft 365 Exchange Online Mailboxes, Teams, and Groups protection workflow on the Cohesity cluster.

• Exchange Online Mailboxes protection is supported only for users present on Azure AD and not for users on the on-premises Active Directory.

• Exchange Online Mailboxes protection is supported for:

  • users present in Azure AD

  • hybrid setup with users present on Azure AD

  It is not supported for:

  • users on the on-premises Active Directory

  • users natively on the on-premises Active Directory that are synchronized to Azure AD.

• By default, the Conversation History/Team Chat folder is excluded during Exchange Online backup.

• Following the Microsoft changes for EWS APIs, Cohesity no longer backs up mailbox items of the type IPM.Teams.SkypeMessage. For more details, see the KB Article.

• Microsoft 365 items with only special characters will not be listed in granular search. The item name must contain at least one alphanumeric character to be listed in the search result.

• Microsoft 365 Backup Storage service is supported for Mailboxes.

  This is a Private Preview feature. Cohesity recommends you use this feature only in non-production environments. Contact your Cohesity account team to enable the feature.

• If the email already exists at the destination during the recovery workflow, the email will be updated.

• Backup or recovery of calendar items, tasks, contacts, notes is not enabled by default. To enable this feature, contact Cohesity Support.

  • Searching for non-email items with empty fields, such as a contact with an empty first name or a calendar invite with no title, is not supported.

  • Recovery from multiple snapshots is not supported.