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, and Discovery Holds folders are currently supported.

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

    This is an Early Access feature. 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 an Early Access feature. 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.

  • Security groups based user import does not support nested security groups.
    For example, if a security group (AA) includes members (X and Y) and security groups (BB and CC), only the members (X and Y) will be imported and not the security groups (BB and CC).