Does Migration Manager for Exchange scan mailboxes for corruption? (4378050)

During migration of mailboxes, corruption can often interfere and prevent a mailbox from successfully migration all messages.  While this is common it often poses an inherit risk for some such as VIP mailboxes that cannot handle not migrating all messages.  

N/A

Migration Manager does not scan a mailbox prior to migrating the mailbox. However, it is important to remember, Migration Manager for Exchange is a coexsistence tool.  So if corruption is detected the user is not effected while the migration is underway and issues can be fixed during the migration process, unbeknownst to the mailbox owner.   

Microsoft or even other third party tools are available for corruption checks however.  Research any of the following for a possible solution to mailbox prechecks.

For example,

Use Powershell:

New-MailboxRepairRequest cmdlet

This cmdlet is a native tool for detecting and fixing mailbox corruption. It's ideal because it targets specific types of corruption without requiring the mailbox database to be offline.

New-MailboxRepairRequest -Mailbox user@domain.com -CorruptionType SearchFolder,AggregateCounts,Folders,ProvisionedFolder

1. Replace user@domain.com with the affected user's email address.

Key Points:

• Corruption Types:
  • SearchFolder: Issues with search folders in the mailbox.
  • AggregateCounts: Incorrect item counts in folders.
  • Folders: Problems with folder structures.
  • ProvisionedFolder: Issues with provisioned folders.
• The process is asynchronous; you can monitor the Application event log for results (Event ID 10047 or similar).

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ExBPA helps diagnose the health of your Exchange environment, identifying potential risks that may impact migrations.

Steps:

1. Download and install ExBPA (if not already installed).
2. Run a scan targeting your mailbox databases and configurations.
3. Review the report for warnings or errors related to the database or mailbox health.

When to Use:

• Before migrations to preemptively identify issues.

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Third-Party Tools

These tools provide additional capabilities for scanning and repairing corruption.

Examples:

1. Stellar Repair for Exchange:
   • Features: Scans mailbox databases, repairs corruption, and exports mailboxes to PST.
   • Usage: Ideal for severe corruption when native tools fail.
2. Kernel for Exchange Server:
   • Features: Allows granular mailbox repair and recovery.
   • Usage: Useful for recovering individual mailboxes from corrupted databases.