OneDrive to OneDrive Migration: The Complete Guide

• Last updated: 03 November 2026
• Migration,OneDrive
• Editorial Team

“OneDrive to OneDrive migration” sounds like one job. It is actually three, and they have almost nothing in common. Moving your own personal files into a work account is a drag-and-drop task. Handing a departing employee’s files to their manager is a race against a retention clock. Moving everyone’s OneDrive into a different Microsoft 365 tenant is a proper migration project, with licensing, identity preparation, and a cutover date. The most common mistake is applying the method from one of these to another.

Microsoft has no “merge accounts” button, and OneDrive accounts can’t be connected to each other, so every scenario comes down to copying or moving files, with different tools and different traps. This guide sorts out which scenario you are in, walks through the method Microsoft documents for each, covers the limits that break moves in practice, and explains what gets lost along the way. Every technical detail was checked against Microsoft’s current documentation. If you are unsure how personal OneDrive and work OneDrive differ in the first place, start with our explainer on how personal OneDrive and OneDrive for Business differ.

What Does “OneDrive to OneDrive Migration” Actually Mean?

It covers three different jobs: moving personal files into a work or school account, transferring one user’s OneDrive to another user in the same tenant, and moving OneDrive content between Microsoft 365 tenants. Which one you are doing decides everything that follows.

Scenario	Typical Trigger	Method	Biggest Catch
Personal to work or school	Someone consolidating their own files into a Microsoft 365 account	OneDrive sync app with both accounts	Batches of about 100 files, and everything must be re-shared
User to user, same tenant	An employee leaves or changes roles	Admin or manager access, then Copy to or Move to	A 30-day default clock before the OneDrive is deleted
Tenant to tenant	A merger, acquisition, or divestiture	Migration Orchestrator or a migration partner	Licensing, prepared users, and no incremental passes

Individuals mostly face the first scenario. Businesses mostly face the second and third, and the second is far more common than people expect, because every departure triggers it. The rest of this guide takes them in that order.

Can You Merge or Transfer OneDrive Accounts Directly?

No. OneDrive accounts can’t be connected or merged, so every scenario relies on copying or moving files, using a different tool depending on whether the accounts are personal, in the same tenant, or in different tenants. Microsoft says plainly that you can’t connect a personal OneDrive to a Microsoft 365 business account, though you can copy or move files between the two.

There is one more thing worth knowing before you try shortcuts. In OneDrive on the web, Copy to and Move to work only within the same account or tenant, into a different library. They won’t send files to a different person’s OneDrive account across a tenant boundary, and they won’t bridge a personal and a work account. For moves between two separate accounts, Microsoft’s own advice is the OneDrive sync app. In practice, “merging” two accounts means moving the content from one into the other and then retiring the account you no longer need.

How Do You Move Files from a Personal OneDrive to a Work or School Account?

Sign in to the OneDrive sync app with both accounts, then move files from the personal folder to the work folder in File Explorer, in batches, which is the method Microsoft documents. It is slow for large libraries but safe and free.

• Sync your work or school OneDrive. Install the OneDrive sync app if it isn’t already on your computer and sign in with your work or school account, so your work OneDrive appears as a folder in File Explorer.
• Add your personal account. In the sync app, open Settings, select Account, then Add an account, and sign in with the personal account. Both OneDrive folders now appear side by side, one for personal and one for work or school.
• Move files in batches. Select files in the personal folder and drag them into the work or school folder. Microsoft recommends moving no more than 100 files at a time, and smaller batches if you have more than 100 GB.
• Handle files the sync app can’t move. OneNote notebooks can’t be moved with the sync app, restricted file types are blocked, and if you have more than 300,000 items the sync app isn’t suitable, so plan another method for those.
• Share files again. Items you shared from your personal OneDrive must be shared again from the work or school account, because moved files are recognized as new files.
• Verify, then clean up. Confirm the files open correctly in OneDrive on the web, delete the originals once everything is shared and checked, then unlink the personal account from the sync app.

A few details from Microsoft’s guidance deserve emphasis. Files you move are recognized as new files in the work account, so don’t expect version history or original authorship details to follow them. The sync app also can’t move OneNote notebooks, and Microsoft says the sync app isn’t suitable beyond 300,000 items, so very large libraries need a migration tool or a partner. Once everything is moved and re-shared, you can either keep using the personal OneDrive or cancel the personal subscription.

What About Moving Files in a Web Browser?

For a small number of files, you can download them from one account in a browser and upload them to the other. It works, but it doesn’t scale: selecting multiple files downloads them as a zip archive that you must unzip and then upload again, folder by folder. Remember too that Copy to and Move to in the browser won’t bridge two accounts, so the browser route is really download and upload, not a true move. For anything beyond a few folders, the sync app is the better tool.

What Should You Check Before You Move Anything?

Check file size, path length, file and folder names, sync volume, and storage room first, because these are the limits that make moves fail partway through. A few minutes of checking saves hours of retrying.

• File size. A single file can be up to 250 GB. Anything larger won’t upload.
• Path length. The full decoded path, including the file name, can’t exceed 400 characters. Deeply nested folders from an old file share are the usual culprit, and adding the destination library’s own folder names makes paths longer, not shorter.
• Blocked names and characters. Characters such as quotation marks, asterisks, colons, angle brackets, question marks, slashes, and pipes are not allowed, and names such as CON, PRN, AUX, NUL, desktop.ini, and anything starting with a tilde and dollar sign are blocked. Leading or trailing spaces and trailing periods also cause trouble. Microsoft’s restrictions page has the full current list.
• Sync volume. Microsoft recommends syncing no more than about 300,000 items across all the libraries you sync, which also caps how much the sync app can comfortably move.
• Storage room. Most business plans include 1 TB per user, and admins can raise that to a hard ceiling of 5 TB following Microsoft’s September 2026 change. Confirm the destination has room, and check the storage and licensing options if it doesn’t.

How Do You Transfer a Departing Employee’s OneDrive to Another User?

When a user is deleted, their manager automatically gets access to their OneDrive and has 30 days by default to copy what they need, so the real work is deciding who keeps what before that clock runs out. This is the OneDrive to OneDrive job most businesses actually face.

What Happens Automatically

• Manager access. By default, when a user is deleted, their manager is given access to the OneDrive and receives an email saying so. This depends on the manager being set in Microsoft Entra ID.
• A 30-day window. The deleted user stays visible in the Microsoft 365 admin center for 30 days, and the default OneDrive retention period is also 30 days.
• A reminder. Seven days before the retention period ends, a second email warns that the OneDrive will be deleted.
• A last-resort window. After retention ends, the OneDrive moves to the site collection recycle bin for 93 days, where only an admin can restore it.
• Retention policies win. Microsoft 365 retention policies and labels take precedence over the standard process, so content can be kept longer, or deleted sooner, than the OneDrive setting suggests.

What an Admin Does

• Get access. In the Microsoft 365 admin center, go to Users, then Active users, select the user, open the OneDrive tab, and under Get access to files, select Create link to files.
• Copy what matters. Download the files, or use Move to or Copy to to send them to your own OneDrive or to a shared library.
• Give someone else access. In the SharePoint admin center, find the former user’s profile and choose Manage site collection owners.
• Change the clock. Admins can set the retention period from 30 days up to 3,650 days in the SharePoint admin center, or with the Set-SPOTenant cmdlet’s OrphanedPersonalSitesRetentionPeriod parameter.

OneDrive gives someone access to the files. It doesn’t transfer them to a new owner. So put team-owned content in a shared library, not another person’s personal OneDrive, or you will repeat the exercise at the next departure. Our comparison of where OneDrive ends and SharePoint begins explains how to decide. Files the leaver shared with colleagues also stay reachable only while the OneDrive exists, so move anything others depend on before retention ends.

How Do You Build an Offboarding Workflow So Departures Stop Being Fire Drills?

Set the handover up before anyone leaves: confirm managers in Microsoft Entra ID, decide your retention period, name who reviews the files, and keep team-owned content out of personal OneDrives. The 30-day clock is generous if you are ready for it, and brutal if you aren’t.

• Keep manager and secondary owner details current. Automatic access depends on them. A deleted user with no manager set leaves nobody with automatic access.
• Choose the retention period on purpose. The 30-day default suits many organizations, while executives, finance staff, and compliance-sensitive roles may justify longer.
• Name the reviewer and the deadline. Decide who reviews a leaver’s files and how quickly, so the manager isn’t discovering the task from an automated email.
• Put shared work in shared places. Files other people need belong in SharePoint libraries or Teams, not a personal OneDrive that will be deleted.
• Use retention policies for regulated content. Microsoft 365 retention takes precedence over the OneDrive setting, so it is the safer control for records you must keep.
• Start before the last day. Copying the important files during the notice period beats racing the clock afterward.

How Do You Migrate OneDrive to a New Tenant?

Use Microsoft’s Migration Orchestrator, which moves OneDrive together with mailboxes, Teams chats, and meetings, or hand the project to a migration partner, because moving between tenants is a project, not a copy job. It is the right route for mergers, acquisitions, and divestitures.

• What it does to OneDrive. Each target user gets a OneDrive, the source OneDrive is removed, and a redirect link is left behind. Incremental and delta passes can’t be performed, so plan the cutover rather than expecting to catch up later.
• What you prepare. Users must already exist and be licensed in the target tenant, and no OneDrive should be provisioned for them beforehand, or the migration fails.
• What it costs. A one-time, per-user license, assigned to either the source or target user.
• What it doesn’t cover. Identities, SharePoint sites, Teams and channels, and groups need their own handling.

Our guide to the Migration Orchestrator and how it works covers the requirements, batches, and known limits in detail, and the wider tenant migration plan shows how OneDrive fits alongside mail, SharePoint, and Teams.

What Gets Lost When You Move Files Between OneDrive Accounts?

Moved files are recognized as new files, so sharing, permissions, and original details are the first things to go, and you should plan to rebuild or re-share them. Knowing this in advance is most of the battle.

• Sharing links and permissions. Anything you shared must be shared again from the new account, and anyone relying on an old link loses access.
• Original metadata. Microsoft says moved files are recognized as new files, so don’t expect version history or details such as who created or last modified a file to follow the move.
• OneNote notebooks. The sync app can’t move them, so they need another route.
• Restricted and badly named files. Blocked file types and names that break the rules above are skipped or flagged.
• Anything over the limits. Files over 250 GB and paths over 400 characters simply won’t land.

If any of this matters for compliance or collaboration, look for a migration tool or partner that preserves permissions and metadata, and test it on a small account first rather than trusting a feature list.

How Do You Move Large OneDrive Accounts Without Errors?

Move in small batches, fix names and paths before you start, and watch sync status as you go, because large moves fail on small problems. Microsoft’s own recommendation for personal accounts above 100 GB is to move files in smaller batches rather than all at once.

• Clean up first. Delete duplicates and old files, rename anything with blocked characters, and shorten deep folder structures before you move.
• Batch deliberately. Move about 100 files at a time, starting with a small test batch to confirm everything lands where you expect.
• Watch the sync icons. The blue circular arrows beside files mean they are still syncing, and a move isn’t finished until they clear.
• Keep the computer awake and connected. Interrupted syncs create duplicate and partial uploads.
• Verify on the web. Open a sample of files in OneDrive in a browser before you delete any originals.

What Should You Tell Users Before a OneDrive Move?

Tell users what will change, what they must redo, and when, because most support tickets after a OneDrive move come from surprises, not failures. A short note before the move saves a long queue after it.

• Sharing will reset. Moved files are new files, so people will need to be given access again, and old links may stop working.
• Which account to sign in to. After a move, the sync app should be signed in to the new account, and the old one unlinked.
• What won’t move. Tell people about OneNote notebooks, blocked file types, and anything that was renamed, so they aren’t hunting for missing items.
• Where the old content lives and for how long. Give the retention window or the date the source will be retired.
• Who to ask. One named contact beats a general help desk address.

How Long Does a OneDrive to OneDrive Migration Take?

It depends mostly on data volume and bandwidth: a single personal account can take hours to a couple of days, an offboarding is bounded by your retention window, and a tenant move runs for weeks. The table below is a planning estimate, not a Microsoft figure.

Scenario	Typical Duration
One personal account to work	A few hours to 2 days
One departing employee	Same day to a week, inside the retention window
50 to 250 users, consolidation	2 to 6 weeks
Tenant to tenant	Several weeks to months, depending on user count

Very large accounts, deep folder trees, many blocked names, and shared content that must be rebuilt all push a project toward the long end.

Should You Do It Yourself or Use a Managed Migration?

Do it yourself for a handful of accounts with simple sharing, and use a managed migration when you are moving many users, need permissions handled correctly, or face a hard deadline.

Situation	DIY Is Fine When	Managed Makes Sense When
Personal to work	One person, a modest library, simple sharing	A team of users, or more than about 300,000 items
Departures	Occasional, with clear managers and ample time	Frequent, bulk, or compliance-sensitive offboarding
Tenant to tenant	Small, with prepared users and spare admin time	Mergers, divestitures, hard cutover dates, or limited admin capacity

If you are weighing options for a larger project, our migration services cover every layer.

Moving from Another Cloud Storage Service Instead?

If your source isn’t OneDrive, the method changes. We have guides for moving Dropbox content into OneDrive, migrating Box to SharePoint, moving Google Drive to OneDrive, and moving file server shares into OneDrive.

How Does Apps4Rent Help with OneDrive Migrations?

Apps4Rent plans and runs the full move, from assessing your OneDrive data and users to cutover and validation, so permissions, sharing, and deadlines are handled as one project rather than a pile of manual copies.

• Assessment. A review of account sizes, file names, paths, sharing, and retention windows to see what needs special handling.
• Method selection. Matching each scenario, personal, departing user, or tenant, to the right approach.
• Preparation. Fixing blocked names and long paths, and getting users, licenses, and mapping in order before anything moves.
• Execution and validation. Running the move in controlled batches and checking the results before the source is retired.
• Support. A single point of contact, with 24/7 phone, chat, and email support throughout.

FAQs About OneDrive to OneDrive Migration

1. What is OneDrive to OneDrive migration?

   It means moving files from one OneDrive to another, and it covers three different jobs: moving personal files into a work or school account, transferring one user’s OneDrive to another user in the same tenant, and moving OneDrive content between Microsoft 365 tenants. Each uses a different method.

2. Can you merge two OneDrive accounts?

   No. OneDrive accounts can’t be connected or merged. Microsoft’s documented approach is to copy or move the files from one account into the other, and then retire the account you no longer need.

3. How do I move files from a personal OneDrive to a work or school account?

   Sign in to the OneDrive sync app with both accounts so two OneDrive folders appear in File Explorer, then drag files from the personal folder to the work folder. Microsoft recommends batches of no more than 100 files, and files you shared need to be shared again afterward.

4. Can I use Copy to or Move to to move files between OneDrive accounts?

   No. In OneDrive on the web, Copy to and Move to work only within the same account or tenant, into a different library. To move files between two separate accounts, use the OneDrive sync app, or a migration tool for larger or tenant-level moves.

5. How do I transfer a departing employee’s OneDrive to another user?

   When a user is deleted, their manager is given access to the OneDrive by default. An admin can also create a link to the files from the user’s OneDrive settings in the Microsoft 365 admin center, then use Move to or Copy to to send them to another OneDrive or a shared library.

6. How long is a deleted user’s OneDrive kept?

   For 30 days by default, and admins can change this from 30 days up to 3,650 days in the SharePoint admin center. Seven days before the period ends a reminder email is sent, and afterward the OneDrive sits in the site collection recycle bin for 93 days, where only an admin can restore it.

7. What is the maximum file size and path length when moving files into OneDrive?

   Each file can be up to 250 GB, and the full path including the file name can’t exceed 400 characters. Certain characters and names are blocked, and Microsoft recommends syncing no more than about 300,000 items.

8. Do sharing links and permissions carry over when I move files between OneDrive accounts?

   No. Moved files are recognized as new files, so items you shared need to be shared again from the new account, and you shouldn’t expect version history or original authorship details to follow them.

9. How do I move OneDrive to a new tenant?

   Use Microsoft’s Migration Orchestrator, which moves OneDrive along with mailboxes, Teams chats, and meetings, or a migration partner. Target users must exist and be licensed first, and the Orchestrator removes the source OneDrive and leaves a redirect link behind.

10. When should I use a managed migration instead of doing it myself?

    Consider a managed migration when you are moving many users, need permissions and sharing handled correctly, face a hard deadline such as a merger or a retention window, or have more than about 300,000 items in an account, which is beyond what the sync app suits.