How many OneDrive users can I migrate at once?

EdbMails supports simultaneous migration of multiple OneDrive sites, and you can run the software on multiple computers to migrate different users in parallel. Throughput still depends on Microsoft 365 limits, throttling, network and the migration computer, so plan controlled batches.

Does EdbMails load OneDrive sites automatically?

Yes. EdbMails loads the available OneDrive sites automatically, and you can use a CSV file to add sites that are not listed.

Can I map source users to different target users in bulk?

Yes. EdbMails supports automatic and manual source-to-target mapping. Review the mapping before each large batch, especially when identities or domains differ.

Can users keep working during a bulk migration?

Yes. Plan a later incremental pass for supported new or modified content before final transition, keeping the same migration computer for an already-migrated site.

How do I handle changes made after the first pass?

Run a subsequent incremental migration, which processes supported new or modified content and reduces unnecessary reprocessing when the documented conditions are maintained.

Do I need Microsoft Entra app registration for bulk migration?

Yes. The OneDrive workflow uses separate source and target Microsoft Entra ID applications with their documented permissions and admin consent.

How do I validate a bulk migration?

Review the EdbMails migration logs for each wave and sign in to representative target OneDrive accounts to confirm files and folders, tracking completed, skipped or failed items.

How should I coordinate user communication?

Follow the same wave plan: tell each group when its initial migration is scheduled, when to stop source changes if required, and when to start working from the destination.

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- Duplicate Remover
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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 Bulk Migration

Migrate Multiple OneDrive Accounts in Batches

EdbMails simplifies bulk OneDrive migration by helping administrators move supported files and folders for multiple users between Microsoft 365 tenants. Select the OneDrive accounts, map each source user to the correct destination, and manage larger transfers in organized batches with progress visibility.

Just $299 for 100 sites

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How Bulk OneDrive Migration Works for Multiple Users

OneDrive bulk migration is the coordinated migration of multiple OneDrive for Business user sites between Microsoft 365 tenants. The current EdbMails product content describes bulk migration support, simultaneous migration of multiple OneDrive sites, automatic loading of available sites, source-to-target mapping, and the option to run the software on multiple computers for different users.

For enterprise projects, bulk migration should be treated as a controlled batch process rather than as a promise that every user can or should be moved at once. Microsoft 365 service limits, throttling, network conditions, source and target readiness, and the migration computer can all influence throughput.

When do you need bulk OneDrive migration?

Bulk migration is useful when an organization must move many OneDrive users during tenant consolidation, merger or acquisition, domain change, provider change, or a broader Microsoft 365 tenant-to-tenant project.

Prepare the user inventory first

Identify every source OneDrive user in scope and confirm the corresponding target account. Remove obsolete users from the migration plan where appropriate and group the remaining users into migration waves that are easy to monitor and validate.

Load and select multiple OneDrive sites

The EdbMails guide documents loading available OneDrive sites automatically, with an option to use CSV for additional sites that are not listed. Administrators can then select the required OneDrive user sites and proceed with source-to-target mapping.

Use automatic and manual mapping

Automatic mapping can accelerate large migration projects, but it should not replace review. Check mappings before each large batch and manually correct users whose source and destination identities differ.

Migrate multiple OneDrive sites simultaneously

EdbMails supports simultaneous migration of multiple OneDrive sites. The commercial source also states that administrators can install the software on multiple computers and migrate different users in parallel. Use this capability carefully and monitor Microsoft 365 throttling, network performance and migration logs rather than assuming linear speed gains.

Run bulk migration in waves

A reliable bulk migration plan normally uses a pilot, followed by manageable user batches. This makes it easier to identify mapping issues, destination-readiness problems and failed items before they affect a much larger population.

Finish with an incremental pass

If users remain active in the source during the migration period, use a subsequent incremental pass for supported new or modified data before final transition. For an already-migrated site, retain the same migration computer where the documented incremental metadata is stored.

Monitor logs and validate target users

For each wave, review the EdbMails migration logs and verify representative target OneDrive accounts. Track completed, skipped or failed items and resolve exceptions before moving to the next batch.

Estimate workload before choosing batch size

Not every user contributes the same migration load. Review the approximate number of users, the size and activity of their OneDrive sites, network conditions, destination readiness and the time available for each migration window. Use that information to choose practical batch sizes rather than relying only on the total user count.

Coordinate user communication and cutover

For larger migrations, technical processing and user communication should follow the same wave plan. Tell each group when its initial migration is scheduled, when final source changes should stop if required by the project, and when users can begin working from the destination. This makes validation and support easier after each batch.

Frequently Asked Questions

What is OneDrive bulk migration?
It is the coordinated migration of multiple OneDrive for Business user sites between Microsoft 365 tenants, run as a controlled batch process.
How many OneDrive users can I migrate at once?
EdbMails supports simultaneous migration of multiple OneDrive sites, and you can run the software on multiple computers to migrate different users in parallel. Throughput still depends on Microsoft 365 limits, throttling, network and the migration computer, so plan controlled batches.
Does EdbMails load OneDrive sites automatically?
Yes. EdbMails loads the available OneDrive sites automatically, and you can use a CSV file to add sites that are not listed.
Can I map source users to different target users in bulk?
Yes. EdbMails supports automatic and manual source-to-target mapping. Review the mapping before each large batch, especially when identities or domains differ.
Should I migrate all users in one batch?
No. Use a pilot followed by manageable waves so mapping issues, destination-readiness problems and failed items are caught before they affect the full population.
How do I choose a batch size?
Consider the number of users, the size and activity of their OneDrive sites, network conditions, destination readiness and the available migration window rather than only the total user count.

Can users keep working during a bulk migration?
Yes. Plan a later incremental pass for supported new or modified content before final transition, keeping the same migration computer for an already-migrated site.
How do I handle changes made after the first pass?
Run a subsequent incremental migration, which processes supported new or modified content and reduces unnecessary reprocessing when the documented conditions are maintained.
Do I need Microsoft Entra app registration for bulk migration?
Yes. The OneDrive workflow uses separate source and target Microsoft Entra ID applications with their documented permissions and admin consent.
How do I validate a bulk migration?
Review the EdbMails migration logs for each wave and sign in to representative target OneDrive accounts to confirm files and folders, tracking completed, skipped or failed items.
How should I coordinate user communication?
Follow the same wave plan: tell each group when its initial migration is scheduled, when to stop source changes if required, and when to start working from the destination.

Related OneDrive migration resources

OneDrive Migration Tool

OneDrive Tenant to Tenant Migration

OneDrive Incremental Migration

OneDrive Migration Project Plan

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