What is OneDrive incremental migration?

It is a subsequent migration run that uses migration metadata to process supported new or modified source content and reduce unnecessary reprocessing of data already handled.

How does the incremental workflow run?

Complete the initial migration, keep the migration environment and metadata available, allow source activity as the plan requires, run another pass for the same source and target mapping, then review logs and validate before cutover.

When should the final incremental pass run?

A common pattern is to run the initial migration several days before transition and run another pass close to cutover, which shortens the gap between the latest source changes and the final target state.

Do I need Microsoft Entra app registration for incremental runs?

Yes. The same source and target Microsoft Entra ID applications used for the migration apply to subsequent incremental runs.

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EdbMails

All-in-one Recovery and Migration
- EDB Recovery and Migration
- OST, PST, MBOX, NSF, EML, MSG
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- SharePoint, OneDrive & Teams
- Google Workspace Migration
- IMAP Migration
- Duplicate Remover
- EdbMails Data Recovery
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EDB Recovery and Migration

EdbMails lets you recover corrupted, damaged, and offline Exchange EDB files, convert EDB mailboxes to PST format, and directly migrate mailbox data to Office 365 and live Exchange Server.

EDB to PST

Recover corrupted, damaged, offline EDB files and convert Exchange EDB mailboxes to PST file format

Public Folder to Exchange

Migrate public folders from an Exchange offline EDB file to live Exchange Server

EDB to Live Exchange Migration

Directly migrate offline Exchange database (EDB) files to live Exchange server

Archive Mailbox to Office 365

Migrate archive mailboxes from offline EDB files directly to Office 365

EDB to Office 365 Migration

Directly migrate offline Exchange database (EDB) files to Office 365

Public Folder to Office 365

Migrate public folders from an offline Exchange EDB file to Office 365

OST, PST, MBOX, NSF, EML, MSG Export and Migration

EdbMails lets you to recover OST and PST files, export OST, PST, MBOX, NSF, EML, and MSG files to PST files, and directly migrate OST, PST, MBOX, and NSF mailbox data to Office 365 and live Exchange Server.

OST Recovery and Migration

Recover offline OST files, convert OST to PST, and migrate OST to Office 365 and Exchange Server

PST Recovery and Migration

Recover Outlook PST files , Export PST to PST, migrate PST to Office 365 and Exchange Server

MBOX Export and Migration

Export MBOX to PST, migrate MBOX to Office 365 and Exchange Server

NSF Export and Migration

Export NSF to PST, migrate NSF to Office 365 and Exchange Server

EML to PST Export

Convert EML files to Outlook PST files

PST to MSG Export

Convert Outlook PST file to MSG file format

MSG to PST Export

Export MSG files to Outlook PST files

Office 365, Exchange Migration

EdbMails lets you securely migrate mailboxes across Microsoft 365, Exchange, Google Workspace (G Suite), and IMAP-supported servers such as Outlook, Gmail, Zimbra, Zoho Mail, and cPanel, ensuring zero downtime.

Office 365 Migration

Migrate between Office 365 tenants, Office 365 to Exchange, Office 365 to PST, PST files to Office 365.

Exchange Migration

Migrate between any Exchange Servers, Exchange to Office 365, Exchange to PST, PST files to Exchange.

Tenant to Tenant Migration

Migrate Mailboxes, Public Folders, Archive Mailboxes between Office 365 Tenants.

Exchange to Office 365

Migrate Mailboxes, Public Folders, Archive Mailboxes from live Exchange server to Office 365.

Office 365 to IMAP

Migrate Office 365 to IMAP, Office 365 to Gmail, Office 365 to Outlook, Office 365 to Zoho etc.

Exchange to IMAP

Migrate from live Exchange Server to IMAP servers such as Gmail, Outlook, and Zoho Mail.

Public Folder to Office 365

Migrate Public Folders between Office 365 tenants with complete folder hierarchy and mailbox data integrity.

Exchange to PST

Export live Exchange Server mailboxes, public folders, and archive mailboxes to Outlook PST files.

SharePoint, OneDrive & Microsoft Teams Migration

EdbMails lets you migrate SharePoint sites, OneDrive data, Microsoft Teams, teams, channels, chats, permissions, and documents between Microsoft 365 tenants while maintaining the existing folder structure and data integrity.

SharePoint Online Migration

Migrate documents, lists, files and folders from SharePoint sites.

OneDrive for Business Migration

Migrate documents, lists, files, folders, private chats from OneDrive.

Microsoft Teams Migration

Migrate Teams, chats, channels, documents, files and folders etc.

Google Workspace / G Suite Migration

EdbMails offers secure Google Workspace migration to Office 365, Exchange, or IMAP, and export to PST covering emails, contacts, calendars and tasks.

Google Workspace Migration

Migrate emails, calendars, contacts, tasks from Google Workspace to Google Workspace, office 365, Exchange and IMAP. Export to PST

Google Workspace to Office 365

Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to Office 365

Google Workspace to Exchange Server

Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to on-Premise Exchange Server

Google Workspace to IMAP

Migrate emails, calendars, contacts, tasks from Google Workspace / G Suite to IMAP, Outlook, Zimbra, Zoho etc.

Google Workspace to Google Workspace

Migrate emails, calendars, contacts, tasks between two Google Workspace / G Suite tenants

Google Workspace to PST

Export emails, calendars, contacts, tasks from Google Workspace / G Suite to Outlook PST files

IMAP Migration

EdbMails IMAP Migration tool lets you easily migrate emails from IMAP servers such as Outlook, Gmail, Zoho Mail, Zimbra, cPanel, and more. Supports IMAP to IMAP, Office 365, Exchange Server, PST, and bulk PST to IMAP migration.

IMAP Email Backup & Migration

Backup and migrate emails from IMAP servers to PST, Office 365, and On-Premises Exchange Server

IMAP to Office 365

Migrate emails, folders, and attachments from IMAP servers to Office 365

IMAP to Exchange

Migrate emails, folders, and attachments from IMAP servers to on-premises Exchange Server

IMAP to PST

Export emails, folders, and attachments from IMAP servers to Outlook PST files for backup

PST to IMAP

Migrate emails, folders, and attachments from bulk PST files to IMAP servers

Duplicate Remover

EdbMails Duplicate Remover lets you easily remove duplicate items from Office 365 and Exchange Server, and from IMAP, Outlook, Gmail, Zimbra, Zoho Mail, etc., ensuring a clean and organized mailbox.

Remove Duplicates

Easily clean up your Office 365, Exchange, Outlook and IMAP accounts by removing duplicate emails.

Remove Duplicates from Office 365

Remove duplicate emails, calendars, contacts, journal tasks, etc. from Office 365.

Remove Duplicates from Exchange Server

Remove duplicate emails, calendars, contacts, journal tasks, etc. from live Exchange Server.

Remove Duplicates from IMAP, Outlook

Remove duplicate emails, attachments from IMAP, Outlook, Gmail, Zimbra, Zoho Mail etc.

Exchange, SharePoint, OneDrive, Teams and Office 365 Backup

EdbMails enables secure, automated backup and recovery for Microsoft 365 services including Exchange Online, SharePoint, OneDrive, Teams, and Live Exchange Server with complete data protection and restore flexibility.

Office 365 Backup

Incremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup

Exchange Server Backup

Incremental, Granular, Encrypted and Compressed Exchange Mailboxes Backup

SharePoint, OneDrive & Teams Backup

Backup Online site collections, Team sites, Office 365 groups, all documents etc.

EdbMails Data Recovery

EdbMails Data Recovery Software lets you recover permanently deleted data, including photos, videos, documents, and archived files, from partitions on hard drives, SSDs, USB drives, SD cards, and external storage devices.

EdbMails Data Recovery

Recover and restore permanently deleted data from hard drives, SSDs, USB drives, SD cards, and etc.

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OneDrive Incremental Migration

Transfer New and Modified OneDrive Content in Later Runs

EdbMails supports incremental OneDrive migration to help administrators transfer eligible new and modified content after an initial migration. Run additional passes when needed, limit unnecessary retransfers, and review the updated destination data as you prepare users for the change to their new accounts.

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How Incremental OneDrive Migration Handles Subsequent Changes

OneDrive incremental migration is used for subsequent migration runs after an initial OneDrive transfer. Instead of treating every pass like a completely new migration, the EdbMails workflow uses migration metadata to identify supported new or modified source content and reduce unnecessary reprocessing of data that was already handled.

This is useful when users continue working in source OneDrive accounts during a staged tenant migration. Administrators can complete the main transfer, continue the project in batches, and then run an incremental pass before the final transition to capture supported changes.

Why use incremental migration for OneDrive?

Large Microsoft 365 tenant migrations are rarely completed at one instant. Files may continue to be added or modified while initial batches are being processed. An incremental pass gives administrators a controlled way to handle supported changes after the initial migration instead of repeating the entire operation unnecessarily.

How EdbMails tracks previous OneDrive migration activity

The current EdbMails FAQ states that certain metadata details are stored locally on the migration computer in encrypted form for the incremental check; the entire OneDrive data is not stored locally for this purpose. That metadata is used during later runs for an already-migrated OneDrive site.

Use the same migration computer for consecutive runs

For an already-migrated OneDrive site, the documented workflow recommends using the same computer during subsequent migration runs so the locally stored incremental metadata is available. Other OneDrive sites that have not previously been migrated from that computer can be handled separately.

Incremental migration workflow

Complete the initial OneDrive migration for the selected users.

Keep the original migration environment and metadata available.

Allow users to continue normal source activity as required by the project plan.

Run another migration pass for the same source and target mapping.

Review the migration logs and validate the destination before cutover.

Use incremental migration with phased projects

Incremental migration works naturally with tenant-to-tenant and cross-tenant projects that are executed in waves. A pilot can be migrated first, followed by larger user batches, with a final incremental pass near transition time for supported new or changed content.

Incremental migration and duplicate handling

Incremental migration is designed to reduce unnecessary reprocessing of previously migrated content when the documented conditions are maintained. Review the logs after each pass to confirm what was processed rather than assuming no item is ever reprocessed.

Validate after the incremental pass

Review the migration log after each incremental run and verify representative target OneDrive sites. Confirm that expected recent changes are present and document any skipped or failed items requiring follow-up.

Where incremental migration fits in the cutover plan

A common pattern is to perform the initial migration several days before the final transition, allow users to continue working in the source, and then run another pass closer to cutover. This shortens the period between the latest source changes and the final target state without requiring administrators to repeat the full migration from the beginning.

Keep mapping and migration context consistent

For repeat runs, preserve the source-to-target mapping used by the original migration unless the project deliberately changes the destination. Review the mapping before the final pass and keep the migration environment available so the application can use the locally stored metadata documented by EdbMails.

Frequently Asked Questions

What is OneDrive incremental migration?
It is a subsequent migration run that uses migration metadata to process supported new or modified source content and reduce unnecessary reprocessing of data already handled.
Why use incremental migration for OneDrive?
Large tenant migrations are rarely completed at one instant. Incremental passes give a controlled way to handle supported changes after the initial migration instead of repeating the whole operation.
Does EdbMails store the entire OneDrive locally?
No. Certain metadata details are stored locally on the migration computer in encrypted form for the incremental check; the entire OneDrive data is not stored locally for this purpose.
Do I need the same computer for incremental runs?
For an already-migrated OneDrive site, use the same computer for subsequent runs so the locally stored incremental metadata is available. Sites not previously migrated from that computer can be handled separately.
How does the incremental workflow run?
Complete the initial migration, keep the migration environment and metadata available, allow source activity as the plan requires, run another pass for the same source and target mapping, then review logs and validate before cutover.
Does incremental migration guarantee zero duplicates?
It is designed to reduce unnecessary reprocessing of previously migrated content when the documented conditions are maintained. Review the logs after each pass to confirm what was processed.

When should the final incremental pass run?
A common pattern is to run the initial migration several days before transition and run another pass close to cutover, which shortens the gap between the latest source changes and the final target state.
Should the mapping stay consistent for repeat runs?
Yes. Preserve the source-to-target mapping used by the original migration unless the project deliberately changes the destination, and review it before the final pass.
Does incremental migration work with phased or cross-tenant projects?
Yes. Migrate a pilot first, then larger batches, with a final incremental pass near transition for supported new or changed content.
How do I validate after an incremental pass?
Review the migration log, verify representative target OneDrive sites, confirm that expected recent changes are present, and document any skipped or failed items.
Do I need Microsoft Entra app registration for incremental runs?
Yes. The same source and target Microsoft Entra ID applications used for the migration apply to subsequent incremental runs.

Related OneDrive migration resources

OneDrive Migration Tool

OneDrive Migration Guide

OneDrive Tenant to Tenant Migration

OneDrive Post-Migration Validation

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