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

  • PST download is supported only for mailbox items and not entire mailboxes.

  • The exported PST of the mailbox items is valid for 72 hours. Ensure that you download the PST file within 72 hours of the recovery task completion.

  • PST recovery of emails with more than 2000 recipients 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

  • In Recoverable Items,

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

      SubstrateHolds folders support is a Private Preview feature. Private Preview was termed as Early Access in the earlier releases. Contact your Cohesity account team to enable the feature.

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

    This is a Private Preview feature. Private Preview was termed as Early Access in the earlier releases. Contact your Cohesity account team to enable the feature.

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

    This is a Private Preview feature. Private Preview was termed as Early Access in the earlier releases. Contact your Cohesity account team to enable the feature.

  • 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 Backup Storage service is supported for Mailboxes.

    This is a Private Preview feature. Private Preview was termed as Early Access in the earlier releases. Contact your Cohesity account team to enable the feature.