How to Use DataNumen Exchange Recovery for Fast Mailbox Restoration

How to Use DataNumen Exchange Recovery for Fast Mailbox Restoration

Overview

DataNumen Exchange Recovery is a tool for repairing corrupted Exchange EDB/STM files and restoring mailboxes, folders, messages, attachments, calendars, contacts, and metadata. The following is a concise, step-by-step guide to restore mailboxes quickly and reliably.

Prerequisites

• Windows server or workstation with sufficient disk space (temporary working space ≥ size of EDB).
• Administrative access to the Exchange server or offline EDB file.
• A copy of the corrupted EDB file (do not work on the original; make a backup).
• DataNumen Exchange Recovery installed and licensed (trial may have limits).

Fast mailbox restoration — step-by-step

1. Prepare

   • Stop any Exchange services that might write to the EDB if working on a live server (or work on an offline copy).
   • Copy the EDB (and STM, if present) to a recovery machine with DataNumen installed.
   • Ensure no antivirus is scanning the files (temporarily disable if necessary).

2. Launch DataNumen Exchange Recovery

   • Open the program with administrative privileges.

3. Select source files

   • Click to browse and select the corrupted EDB file. If there’s a matching STM, supply it as well.
   • Optionally enable “Detect and fix logical errors” or similar settings if available.

4. Choose recovery mode

   • Use Quick Recovery to extract intact mailboxes fast.
   • Use Advanced/Deep Recovery if the EDB is heavily corrupted (slower but more thorough).

5. Select output format

   • For fastest mailbox restoration to a working Exchange environment, choose PST export per mailbox (one PST per mailbox).
   • Alternatively choose MSG/EML, Office 365 import, or direct Live Exchange if the tool and your environment support it.

6. Filter and map mailboxes (optional but speed-optimizing)

   • If you only need specific mailboxes, select them to avoid processing the entire EDB.
   • Use date or folder filters to limit recovered items and reduce processing time.

7. Start recovery

   • Click Recover/Start. Monitor progress — estimated time depends on file size and selected mode.

8. Validate results

   • Open recovered PSTs in Outlook (File > Open > Outlook Data File) and verify mailbox items, folders, and metadata.
   • For direct Exchange import, ensure mailbox mapping and permissions are correct.

9. Import recovered mailboxes into Exchange

   • For PST imports, use Exchange’s New-MailboxImportRequest (Exchange Management Shell) or Outlook to import into user mailboxes.
   • For Office 365, use the preferred migration/import method (e.g., Import Service, AzCopy + network upload, or third-party migration tool).

10. Finalize

• Re-enable Exchange services and antivirus.
• Keep logs and a copy of recovered PSTs for verification/audit.
• If issues persist, consider running Deep Recovery again or contacting DataNumen support.

Quick tips for speed and reliability

• Work on a copy of the EDB to avoid additional corruption.
• Prefer extracting only required mailboxes and use filters.
• Use a machine with fast disk I/O (SSD) and ample RAM.
• If time-critical, prioritize Quick Recovery first, then run Deep Recovery on remaining items.

Troubleshooting common issues

• “Unreadable or partially recovered items”: Rerun in Deep/Advanced mode.
• “Large mailbox split or missing items”: Check for folder-level filters used during recovery.
• “Import errors into Exchange”: Confirm PST compatibility (Outlook/Exchange versions) and mailbox quotas/permissions.

Date: February 5, 2026