Why assess OneDrive before migrating?

The assessment produces the inputs needed for source and target connection, user-site selection, mapping, migration waves, incremental migration and validation, which reduces avoidable issues during production.

What should I assess in the source environment?

Identify every OneDrive user and site that may be in scope, and record content volume, business owner and user status such as active, dormant, team-shared or scheduled to leave.

How do I assess data characteristics?

Review large user sites, unusual file types, deep folder structures and obsolete content, and validate the characteristics that matter to the business with a representative pilot.

How do I assess authentication and administrative access?

Confirm the required source and target Microsoft 365 administrators are available, that the project can create the Microsoft Entra applications, and review the OneDrive source and target Graph permissions.

Does the assessment become the project plan?

Yes. The assessment outputs become the basis of the OneDrive migration project plan.

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EdbMails

All-in-one Recovery and Migration
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- OST, PST, MBOX, NSF, EML, MSG
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- 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 Migration Assessment

Assess OneDrive Migration Scope Before You Move

Assess your OneDrive migration before moving user files between Microsoft 365 tenants. This EdbMails guide helps you review account counts, storage volume, sharing requirements, destination mappings, and possible blockers, making it easier to define a workable scope and migration approach.

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What a OneDrive Migration Assessment Should Cover

A OneDrive migration assessment is the discovery stage used to understand the source environment, target readiness, user mapping complexity, migration volume and operational risks before a Microsoft 365 tenant move begins.

For EdbMails projects, the assessment should produce the inputs needed for source and target connection, user-site selection, source-to-target mapping, migration waves, incremental migration and validation.

Assess the source OneDrive environment

Identify every OneDrive user and site that may be in scope. Record approximate content volume, business owner, user status and whether the account is active, dormant, shared by a team or scheduled to leave the organization.

Assess target account readiness

For each source user, confirm the intended target Microsoft 365 account. Identify missing users, renamed users, changed domains and target OneDrive sites that still need to be provisioned.

Assess mapping complexity

Classify mappings as simple one-to-one, renamed user, domain-changed user, different target owner or exception. This helps estimate how much manual review will be required after EdbMails loads and maps the sites.

Assess data characteristics

Review large user sites, unusual file types, deep folder structures and content that is no longer required. Use a representative pilot to validate any data characteristics that are important to the business instead of assuming every source property behaves identically in the destination.

Assess authentication and administrative access

Confirm that the Microsoft 365 administrators needed for the source and target are available and that the project can create the required Microsoft Entra application registrations. Review the OneDrive-specific source and target Microsoft Graph application permissions before scheduling production migration.

Assess migration-window and throughput constraints

Estimate the number of users, data volume, network conditions and available migration window. EdbMails supports simultaneous migration of multiple OneDrive sites, but throughput can still be influenced by Microsoft 365 throttling, network performance, source activity and target conditions.

Assess active-user change risk

Determine whether users will continue working in source OneDrive accounts while migration is in progress. If they will, include an incremental migration stage in the plan and retain the migration environment required for the documented incremental check.

Assess validation requirements

Define what must be checked after migration. At minimum, plan to review logs and verify representative target files and folders. If metadata, sharing or access is business critical, include explicit validation for those areas.

Assessment output

The assessment should end with a migration inventory, source-to-target mapping plan, pilot list, migration waves, authentication readiness status, expected exceptions, incremental strategy and validation checklist. These outputs become the basis of the OneDrive migration project plan.

Frequently Asked Questions

What is a OneDrive migration assessment?
It is the discovery stage used to understand the source environment, target readiness, user mapping complexity, migration volume and operational risks before a Microsoft 365 tenant move begins.
Why assess OneDrive before migrating?
The assessment produces the inputs needed for source and target connection, user-site selection, mapping, migration waves, incremental migration and validation, which reduces avoidable issues during production.
What should I assess in the source environment?
Identify every OneDrive user and site that may be in scope, and record content volume, business owner and user status such as active, dormant, team-shared or scheduled to leave.
How do I assess target account readiness?
For each source user, confirm the intended target account and identify missing users, renamed users, changed domains and target OneDrive sites that still need provisioning.
How do I assess mapping complexity?
Classify mappings as simple one-to-one, renamed user, domain-changed user, different target owner or exception to estimate how much manual review will be required.
How do I assess data characteristics?
Review large user sites, unusual file types, deep folder structures and obsolete content, and validate the characteristics that matter to the business with a representative pilot.

How do I assess authentication and administrative access?
Confirm the required source and target Microsoft 365 administrators are available, that the project can create the Microsoft Entra applications, and review the OneDrive source and target Graph permissions.
How do I assess throughput constraints?
Estimate the number of users, data volume, network conditions and migration window. EdbMails supports simultaneous migration of multiple OneDrive sites, but throughput is still influenced by throttling, network, source activity and target conditions.
How do I assess active-user change risk?
Determine whether users will keep working in source OneDrive during migration. If they will, include an incremental migration stage and retain the environment required for the documented incremental check.
What are the assessment outputs?
A migration inventory, source-to-target mapping plan, pilot list, migration waves, authentication readiness status, expected exceptions, incremental strategy and validation checklist.
Does the assessment become the project plan?
Yes. The assessment outputs become the basis of the OneDrive migration project plan.

Related OneDrive migration resources

OneDrive Migration Tool

OneDrive Migration Project Plan

OneDrive Pre-Migration Planning

OneDrive Migration Checklist

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