Sync & Recover

Document created by user.oxriBaJeN4 Employee on Jun 14, 2017Last modified by user.Yo2IBgvWqr on Mar 2, 2018
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This guide provides an overview of the Sync & Recover functionality. This is available from the administration console, for those accounts that have it enabled.

Sync & Recover includes mailbox management tasks (e.g. managed folders and message stubbing). Stubbing / managed folders requires the use of the Mimecast Synchronization Engine. Mailbox synchronization and recover doesn't.

Applies To...


  • Administrators responsible for backing up and restoring their user's data.





Synchronization Task ListSync and Recover allows you to synchronize your user's mailbox folder structure, calendar content, and contacts from Exchange On-Premises or Office 365 (Exchange Online) mailboxes with our archive. 


Once set up, synchronization starts automatically multiple times throughout the day. There is no exact synchronization timing, as each user's mailbox synchronization is balanced across that period. This prevents any undue server performance issues caused by everyone's mailbox being synchronized at once.


Once archived, a user's data is accessible to administrators with the appropriate permissions. They can:

  • View the content.
  • Browse and search folder structure.
  • Export and restore the content (if this functionality is enabled on your account).
  • Create a snapshot of a user's mailbox at a specific point in time, by configuring an existing sync task. This allows you to export or restore selected content, or download individual mailbox items from the snapshot. See the Sync & Recover: Creating Snapshots page for more information.
Whilst Sync and Recover is an administrator function, end users have access to archived email and familiar mailbox folder tree in one of the end user applications. They don't have access to calendar or contact items.



  • A Mimecast Synchronization Engine Exchange Services installation is required to have calendars available for continuity purposes.
  • To manage a task's details, your logon must have permission to use the following menu items:



To use Sync and Recover:

  • You must be archiving or retaining email for at least 58 days.
  • Legacy messages in your user mailboxes (e.g. those sent / received prior to archiving with us) must be archived with us.
    Speak to us if you've not yet ingested legacy data.
  • Create a Server Connection.


Standalone Exchange Requirements


If you're using a standalone exchange, the following requirements apply. You must:

  • Allow inbound HTTPS access from us to your organization’s Client Access Server (/ews/exchange.asmx).
  • Share your master mailbox's credentials with the Application Impersonation management role with us.
  • Allow us to extract the folder tree and message metadata, by configuring impersonation rights to your organization's mailboxes. This requires you to provide us with the mailbox credentials of the user you wish us to use. See the Configuring Application Impersonation guide for your version of Exchange for full details.


Office 365 Requirements


If you're using Office 365, the following requirements apply. You must:


Using Mimecast Synchronization Engine


If you're currently syncing and recovering by using the Mimecast Synchronization Engine, you can upgrade to this method without impacting your existing archive folder views. During the migration process, consider the following:

  • The first time a user is migrated to this platform, the service will synchronize the metadata of all messages and folders in the mailbox.
  • When a user is switched from mailbox folder replication using the Mimecast Synchronization Engine, there is no rollback path.
  • You don't have to migrate all users at once, but any data submissions from the Mimecast Synchronization Engine for a migrated user are ignored. 


See Also...